l10n correctness fix for Bug 399665 - NPOB for en-US

toolkit/mozapps/installer/windows/nsis/check-locales.pl

@@ -51,7 +51,7 @@ sub readProperties
 
     $contents =~ s/\\$$//gm;
 
-    return $contents =~ /^\s*([^#!\r\n]*)$/gm;
+    return $contents =~ /^\s*([^#!\n]*)$/gm;
 }
 
 sub checkProperties