Fix for Emulator Issue #10267: Game list column sizes are being incorrectly calculated.

Default column width was being used for  math related to automatic column sizing, in the case of COLUMN_SIZE the default width was -1  which resulted in an issue where an errant scrollbar would appear.

Source/Core/DolphinWX/GameListCtrl.cpp

@@ -1461,7 +1461,7 @@ void CGameListCtrl::AutomaticColumnWidth()
         if (c.resizable)
           visible_columns.push_back(c.id);
         else
-          remaining_width -= c.default_width;
+          remaining_width -= GetColumnWidth(c.id);
       }
     }