Bug 63117 Numbers in prefs accepted in octal when started with 0 and hexadecimal when started with 0x

patch by eddyk@netscape.com/durbacher@gmx.de, r=neil sr=alecf

suite/common/pref/nsPrefWindow.js

@@ -242,7 +242,12 @@ nsPrefWindow.prototype =
                                 value = !value;
                               break;
                             case "int":
-                              value = parseInt(value);                              
+                              if( value.match(/[^\d\s]/) )
+                                {   // reload old value to avoid setting an invalid one
+                                  value = this.getPref(preftype, itemObject.prefstring)
+                                  break;
+                                }
+                              value = parseInt(value, 10);                              
                               break;
                             case "color":
                               if( toString(value) == "" )