Fixed MakeSubSurface compiling issue for DirectFB <= 1.2.0

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403500

src/video/directfb/SDL_DirectFB_video.h

@@ -71,9 +71,9 @@
 #define DFBENV_USE_LINUX_INPUT		"SDL_DIRECTFB_LINUX_INPUT"      /* Default: on  */
 #define DFBENV_USE_WM				"SDL_DIRECTFB_WM"		      	/* Default: off  */
 
-#define SDL_DFB_RELEASE(x) do { if ( x ) { x->Release(x); x = NULL; } } while (0)
-#define SDL_DFB_FREE(x) do { if ( x ) { SDL_free(x); x = NULL; } } while (0)
-#define SDL_DFB_UNLOCK(x) do { if ( x ) { x->Unlock(x); } } while (0)
+#define SDL_DFB_RELEASE(x) do { if ( (x) != NULL ) { x->Release(x); x = NULL; } } while (0)
+#define SDL_DFB_FREE(x) do { if ( (x) != NULL ) { SDL_free(x); x = NULL; } } while (0)
+#define SDL_DFB_UNLOCK(x) do { if ( (x) != NULL ) { x->Unlock(x); } } while (0)
 
 #if DEBUG
 #define SDL_DFB_DEBUG(x...) do { fprintf(LOG_CHANNEL, "%s:", __FUNCTION__); fprintf(LOG_CHANNEL, x); } while (0)

src/video/directfb/SDL_DirectFB_window.c

@@ -420,7 +420,7 @@ DirectFB_AdjustWindowSurface(SDL_Window * window)
     }
 
     if (adjust) {
-#if DFB_VERSION_ATLEAST(1,2,0)
+#if DFB_VERSION_ATLEAST(1,2,1)
        SDL_DFB_CHECKERR(windata->window->ResizeSurface(windata->window,
                                                         windata->size.w,
                                                         windata->size.h));
@@ -430,10 +430,7 @@ DirectFB_AdjustWindowSurface(SDL_Window * window)
                                                           &windata->client));
 #else
        /* recreate subsurface */
-       windata->surface->ReleaseSource(windata->surface);
-       windata->window_surface->ReleaseSource(windata->window_surface);
        SDL_DFB_RELEASE(windata->surface);
-       windata->surface = NULL;
        SDL_DFB_CHECKERR(windata->window->ResizeSurface(windata->window,
                                                        windata->size.w,
                                                        windata->size.h));