Fix some of the things clang --analyze flagged

6 files changed, 10 insertions, 15 deletions

diff --git a/src/renderergl1/tr_backend.c b/src/renderergl1/tr_backend.c
index f00a9257..432050b6 100644
--- a/src/renderergl1/tr_backend.c
+++ b/src/renderergl1/tr_backend.c
@@ -54,7 +54,9 @@ void GL_Bind( image_t *image ) {
 	}
 
 	if ( glState.currenttextures[glState.currenttmu] != texnum ) {
-		image->frameUsed = tr.frameCount;
+		if ( image ) {
+			image->frameUsed = tr.frameCount;
+		}
 		glState.currenttextures[glState.currenttmu] = texnum;
 		qglBindTexture (GL_TEXTURE_2D, texnum);
 	}
@@ -216,7 +218,7 @@ void GL_State( unsigned long stateBits )
 	//
 	if ( diff & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
 	{
-		GLenum srcFactor, dstFactor;
+		GLenum srcFactor = GL_ONE, dstFactor = GL_ONE;
 
 		if ( stateBits & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
 		{
@@ -250,7 +252,6 @@ void GL_State( unsigned long stateBits )
 				srcFactor = GL_SRC_ALPHA_SATURATE;
 				break;
 			default:
-				srcFactor = GL_ONE;		// to get warning to shut up
 				ri.Error( ERR_DROP, "GL_State: invalid src blend state bits" );
 				break;
 			}
@@ -282,7 +283,6 @@ void GL_State( unsigned long stateBits )
 				dstFactor = GL_ONE_MINUS_DST_ALPHA;
 				break;
 			default:
-				dstFactor = GL_ONE;		// to get warning to shut up
 				ri.Error( ERR_DROP, "GL_State: invalid dst blend state bits" );
 				break;
 			}
@@ -546,8 +546,8 @@ void RB_RenderDrawSurfList( drawSurf_t *drawSurfs, int numDrawSurfs ) {
 		// change the tess parameters if needed
 		// a "entityMergable" shader is a shader that can have surfaces from seperate
 		// entities merged into a single batch, like smoke and blood puff sprites
-		if (shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted 
-			|| ( entityNum != oldEntityNum && !shader->entityMergable ) ) {
+		if ( shader != NULL && ( shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted 
+			|| ( entityNum != oldEntityNum && !shader->entityMergable ) ) ) {
 			if (oldShader != NULL) {
 				RB_EndSurface();
 			}
diff --git a/src/renderergl1/tr_image.c b/src/renderergl1/tr_image.c
index 082936a7..665038c9 100644
--- a/src/renderergl1/tr_image.c
+++ b/src/renderergl1/tr_image.c
@@ -327,7 +327,6 @@ static void ResampleTexture( unsigned *in, int inwidth, int inheight, unsigned *
 	for (i=0 ; i<outheight ; i++, out += outwidth) {
 		inrow = in + inwidth*(int)((i+0.25)*inheight/outheight);
 		inrow2 = in + inwidth*(int)((i+0.75)*inheight/outheight);
-		frac = fracstep >> 1;
 		for (j=0 ; j<outwidth ; j++) {
 			pix1 = (byte *)inrow + p1[j];
 			pix2 = (byte *)inrow + p2[j];
diff --git a/src/renderergl1/tr_main.c b/src/renderergl1/tr_main.c
index 2b6ce52f..c2e32c94 100644
--- a/src/renderergl1/tr_main.c
+++ b/src/renderergl1/tr_main.c
@@ -813,10 +813,6 @@ static qboolean IsMirror( const drawSurf_t *drawSurf, int entityNum )
 		// translate the original plane
 		originalPlane.dist = originalPlane.dist + DotProduct( originalPlane.normal, tr.or.origin );
 	} 
-	else 
-	{
-		plane = originalPlane;
-	}
 
 	// locate the portal entity closest to this plane.
 	// origin will be the origin of the portal, origin2 will be
diff --git a/src/renderergl1/tr_marks.c b/src/renderergl1/tr_marks.c
index f85a1244..05afb16c 100644
--- a/src/renderergl1/tr_marks.c
+++ b/src/renderergl1/tr_marks.c
@@ -42,8 +42,8 @@ Out must have space for two more vertexes than in
 static void R_ChopPolyBehindPlane( int numInPoints, vec3_t inPoints[MAX_VERTS_ON_POLY],
 								   int *numOutPoints, vec3_t outPoints[MAX_VERTS_ON_POLY], 
 							vec3_t normal, vec_t dist, vec_t epsilon) {
-	float		dists[MAX_VERTS_ON_POLY+4];
-	int			sides[MAX_VERTS_ON_POLY+4];
+	float		dists[MAX_VERTS_ON_POLY+4] = { 0 };
+	int			sides[MAX_VERTS_ON_POLY+4] = { 0 };
 	int			counts[3];
 	float		dot;
 	int			i, j;
diff --git a/src/renderergl1/tr_shader.c b/src/renderergl1/tr_shader.c
index c6d91a0c..f6f5c80d 100644
--- a/src/renderergl1/tr_shader.c
+++ b/src/renderergl1/tr_shader.c
@@ -1591,7 +1591,7 @@ static qboolean ParseShader( char **text )
 		// light <value> determines flaring in q3map, not needed here
 		else if ( !Q_stricmp(token, "light") ) 
 		{
-			token = COM_ParseExt( text, qfalse );
+			(void)COM_ParseExt( text, qfalse );
 			continue;
 		}
 		// cull <face>
diff --git a/src/renderergl1/tr_world.c b/src/renderergl1/tr_world.c
index 2a5c750c..d7f67ebc 100644
--- a/src/renderergl1/tr_world.c
+++ b/src/renderergl1/tr_world.c
@@ -531,7 +531,7 @@ R_ClusterPVS
 ==============
 */
 static const byte *R_ClusterPVS (int cluster) {
-	if (!tr.world || !tr.world->vis || cluster < 0 || cluster >= tr.world->numClusters ) {
+	if (!tr.world->vis || cluster < 0 || cluster >= tr.world->numClusters ) {
 		return tr.world->novis;
 	}