Fix Bug 145057: Typos bug in Meld

Thanks to raphaelh@uai.com.br (Raphael Higino)

Author: Stephen Kennedy

dirdiff.py

@@ -404,7 +404,7 @@ def add(self, pane, items):
                                 self.items[ ci ][pane] = i
                     def get(self):
                         if len(self.bad):
-                            misc.run_dialog(_("You are running a case insensitve comparison on"
+                            misc.run_dialog(_("You are running a case insensitive comparison on"
                                 " a case sensitive filesystem. Some files are not visible:\n%s")
                                 % "\n".join( self.bad ), self.parent )
                         keys = self.items.keys()