Bug 695965: Fix use of uninitialized memory in nsUrlClassifierDBService::CheckClean. r=bent

toolkit/components/url-classifier/nsUrlClassifierDBService.cpp

@@ -1430,7 +1430,7 @@ nsUrlClassifierDBService::CheckClean(const nsACString &spec,
     rv = KeyedHash(fragkey, hostprefix, prefixkey, &codedkey);
     NS_ENSURE_SUCCESS(rv, rv);
 
-    bool found;
+    bool found = false;
     bool ready = false;  /* opportunistic probe */
     rv = mPrefixSet->Probe(codedkey, prefixkey, &ready, &found);
     NS_ENSURE_SUCCESS(rv, rv);

toolkit/components/url-classifier/nsUrlClassifierPrefixSet.cpp

@@ -278,6 +278,8 @@ nsUrlClassifierPrefixSet::Probe(PRUint32 aPrefix, PRUint32 aKey,
 {
   MutexAutoLock lock(mPrefixSetLock);
 
+  *aFound = false;
+
   // We might have raced here with a LoadPrefixSet call,
   // loading a saved PrefixSet with another key than the one used to probe us.
   // This must occur exactly between the GetKey call and the Probe call.