Bug 550925 - 'Workers: nsDOMWorkerTimeout::Init sets mInterval to an uninitialized value if aArgc <= 1'. r+sr=jst

dom/src/threads/nsDOMWorkerTimeout.cpp

@@ -256,6 +256,7 @@ nsDOMWorkerTimeout::Init(JSContext* aCx, PRUint32 aArgc, jsval* aArgv,
   else {
     // If no interval was specified, treat this like a timeout, to avoid
     // setting an interval of 0 milliseconds.
+    interval = 0;
     aIsInterval = PR_FALSE;
   }