"Fix" assert in new UI align code.

Looks like UI code can produce widgets with same left/top positions (in very narrow space case).
Not nice, but we do not really care, UI becomes unusable way before we reach that point anyway.

source/blender/editors/interface/interface_align.c

@@ -296,7 +296,10 @@ static int ui_block_align_butal_cmp(const void *a, const void *b)
 		return (*butal->borders[LEFT] > *butal_other->borders[LEFT]) ? 1 : -1;
 	}
 
-	BLI_assert(0);
+	/* XXX We cannot actually assert here, since in some very compressed space cases, stupid UI code produces
+	 *     widgets which have the same TOP and LEFT positions...
+	 *     We do not care really, because this happens when UI is way too small to be usable anyway. */
+	/* BLI_assert(0); */
 	return 0;
 }