Bug 700195 - Propagate error in netscape_security_isPrivilegeEnabled. r=bholley

--HG--
extra : rebase_source : bcf741d0e8aa5838719610d5ae966915c926e489

caps/src/nsSecurityManagerFactory.cpp

@@ -144,6 +144,8 @@ netscape_security_isPrivilegeEnabled(JSContext *cx, uintN argc, jsval *vp)
             if (NS_FAILED(rv)) 
                 result = JS_FALSE;
         }
+    } else {
+        return JS_FALSE;
     }
     JS_SET_RVAL(cx, vp, BOOLEAN_TO_JSVAL(result));
     return JS_TRUE;