Move grab unsupported warning to low-level.

softhddev.c

@@ -1760,9 +1760,6 @@ uint8_t *GrabImage(int *size, int jpeg, int quality, int width, int height)
 	}
 	return NULL;
     }
-    if (width != -1 && height != -1) {
-	Warning(_("softhddev: scaling unsupported\n"));
-    }
     return VideoGrab(size, &width, &height, 1);
 }
 

video.c

@@ -8859,8 +8859,12 @@ uint8_t *VideoGrab(int *size, int *width, int *height, int write_header)
 	free(data);
 
 	return rgb;
-    }
+    } else
 #endif
+    {
+	Warning(_("softhddev: grab unsupported\n"));
+    }
+
     (void)size;
     (void)width;
     (void)height;