wined3d: Get rid of SFLAG_DONOTFREE.

dlls/wined3d/surface.c

@@ -587,7 +587,12 @@ void surface_prepare_map_memory(struct wined3d_surface *surface)
 
 static void surface_evict_sysmem(struct wined3d_surface *surface)
 {
-    if (surface->resource.map_count || surface->flags & SFLAG_DONOTFREE)
+    /* In some conditions the surface memory must not be freed:
+     * SFLAG_CONVERTED: Converting the data back would take too long
+     * SFLAG_DYNLOCK: Avoid freeing the data for performance
+     * SFLAG_CLIENT: OpenGL uses our memory as backup */
+    if (surface->resource.map_count || surface->flags & (SFLAG_CONVERTED | SFLAG_DYNLOCK
+            | SFLAG_CLIENT | SFLAG_PIN_SYSMEM))
         return;
 
     wined3d_resource_free_sysmem(&surface->resource);

dlls/wined3d/wined3d_private.h

@@ -2350,16 +2350,6 @@ void flip_surface(struct wined3d_surface *front, struct wined3d_surface *back) D
 #define SFLAG_ALLOCATED         0x00000800 /* A GL texture is allocated for this surface. */
 #define SFLAG_SRGBALLOCATED     0x00001000 /* A sRGB GL texture is allocated for this surface. */
 
-/* In some conditions the surface memory must not be freed:
- * SFLAG_CONVERTED: Converting the data back would take too long
- * SFLAG_DYNLOCK: Avoid freeing the data for performance
- * SFLAG_CLIENT: OpenGL uses our memory as backup
- */
-#define SFLAG_DONOTFREE     (SFLAG_CONVERTED        | \
-                             SFLAG_DYNLOCK          | \
-                             SFLAG_CLIENT           | \
-                             SFLAG_PIN_SYSMEM)
-
 enum wined3d_conversion_type
 {
     WINED3D_CT_NONE,