Fix a few warnings

code/renderergl1/tr_shader.c

@@ -2915,7 +2915,7 @@ a single large text block that can be scanned for shader names
 static void ScanAndLoadShaderFiles( void )
 {
 	char **shaderFiles;
-	char *buffers[MAX_SHADER_FILES];
+	char *buffers[MAX_SHADER_FILES] = {0};
 	char *p;
 	int numShaderFiles;
 	int i;