Fix for 3776.

network/module/nsHttpUrl.cpp

@@ -667,7 +667,9 @@ nsHttpUrlImpl::ReconstructSpec(void)
 
 PRBool nsHttpUrlImpl::Equals(const nsIURL* aURL) const 
 {
-    PRBool bIsEqual;
+    PRBool bIsEqual(PR_FALSE);
+    if (aURL)
+    {
         NS_LOCK_INSTANCE();
         nsIHttpURL* otherURL;
         if (NS_SUCCEEDED(((nsIURL*)aURL)->QueryInterface(kIHttpURLIID, (void**)&otherURL))) {
@@ -677,9 +679,8 @@ PRBool nsHttpUrlImpl::Equals(const nsIURL* aURL) const
                               (0 == PL_strcmp(mFile, other->mFile)));
             NS_RELEASE(otherURL);
         }
-    else
-        bIsEqual = PR_FALSE;
         NS_UNLOCK_INSTANCE();
+    }
     return bIsEqual;
 }