wined3d: Return a fake pixel format if gl is not loaded.

dlls/wined3d/utils.c

@@ -437,11 +437,16 @@ const StaticPixelFormatDesc *getFormatDescEntry(WINED3DFORMAT fmt, WineD3D_GL_In
         idx = getFmtIdx(WINED3DFMT_UNKNOWN);
     }
     if(glDesc) {
-        if(!gl_info) {
-            ERR("OpenGL pixel format information was requested, but no gl info structure passed\n");
-            return NULL;
+        if(!gl_info->gl_formats) {
+            /* If we do not have gl format information, provide a dummy NULL format. This is an easy way to make
+             * all gl caps check return "unsupported" than catching the lack of gl all over the code. ANSI C requires
+             * static variables to be initialized to 0.
+             */
+            static const GlPixelFormatDesc dummyFmt;
+            *glDesc = &dummyFmt;
+        } else {
+            *glDesc = &gl_info->gl_formats[idx];
         }
-        *glDesc = &gl_info->gl_formats[idx];
     }
     return &formats[idx];
 }