glx: Default sRGBCapable in the same place as the other config attribs

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9992>

src/glx/glxconfig.c

@@ -249,7 +249,7 @@ glx_config_create_list(unsigned count)
       (*next)->bindToMipmapTexture = GLX_DONT_CARE;
       (*next)->bindToTextureTargets = GLX_DONT_CARE;
       (*next)->yInverted = GLX_DONT_CARE;
-      (*next)->sRGBCapable = GLX_DONT_CARE;
+      (*next)->sRGBCapable = GL_FALSE;
 
       next = &((*next)->next);
    }

src/glx/glxext.c

@@ -651,8 +651,6 @@ createConfigsFromProperties(Display * dpy, int nvisuals, int nprops,
        */
       m->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
 #endif
-      /* Older X servers don't send this so we default it here. */
-      m->sRGBCapable = GL_FALSE;
        __glXInitializeVisualConfigFromTags(m, nprops, props,
                                           tagged_only, GL_TRUE);
       m->screen = screen;