Fix a few compiler warnings reported by clang.

source/blender/blenlib/intern/BLI_ghash.c

@@ -69,7 +69,7 @@ typedef struct Entry {
 	void *key, *val;
 } Entry;
 
-typedef struct GHash {
+struct GHash {
 	GHashHashFP hashfp;
 	GHashCmpFP cmpfp;
 
@@ -78,7 +78,7 @@ typedef struct GHash {
 	unsigned int nbuckets;
 	unsigned int nentries;
 	unsigned short cursize, flag;
-} GHash;
+};
 
 
 /* -------------------------------------------------------------------- */

source/blender/bmesh/tools/bmesh_edgenet.c

@@ -117,7 +117,7 @@ static unsigned int bm_edgenet_path_from_pass(
 		v_ls_tot += 1;
 		v = vn->prev;
 		vn = &vnet_info[BM_elem_index_get(v)];
-	} while ((vn->pass == pass));
+	} while (vn->pass == pass);
 
 	return v_ls_tot;
 }
@@ -145,7 +145,7 @@ static bool bm_edgenet_path_check_overlap(
 			v_ls_tot += 1;
 			v = vn->prev;
 			vn = &vnet_info[BM_elem_index_get(v)];
-		} while ((vn->pass == pass));
+		} while (vn->pass == pass);
 	}
 
 	if (v_ls_tot) {

source/gameengine/Ketsji/BL_BlenderShader.cpp

@@ -44,7 +44,6 @@
  
 BL_BlenderShader::BL_BlenderShader(KX_Scene *scene, struct Material *ma, int lightlayer)
 :
-	mScene(scene),
 	mMat(ma),
 	mLightLayer(lightlayer),
 	mGPUMat(NULL)

source/gameengine/Ketsji/BL_BlenderShader.h

@@ -57,7 +57,6 @@ class BL_Material;
 class BL_BlenderShader
 {
 private:
-	KX_Scene		*mScene;
 	struct Scene	*mBlenderScene;
 	struct Material	*mMat;
 	int				mLightLayer;