Fix crash on pasting from clipboard

I don't know why it didn't happen for anyone else, but according to https://wiki.libsdl.org/SDL_GetClipboardText : "Use this function to get UTF-8 text from the clipboard, which must be freed with SDL_free().". MSVC detected some heap corruption because of free(text);

src/ui/controls/edit.cpp

@@ -2578,7 +2578,7 @@ bool CEdit::Paste()
         InsertOne(c);
     }
 
-    free(text);
+    SDL_free(text);
     Justif();
     ColumnFix();
     SendModifEvent();