Bug 1156977 - Assert when aClassName is empty in BloatEntry. r=froydnj

xpcom/base/nsTraceRefcnt.cpp

@@ -247,6 +247,7 @@ public:
   BloatEntry(const char* aClassName, uint32_t aClassSize)
     : mClassSize(aClassSize)
   {
+    NS_ASSERTION(strlen(aClassName) > 0, "BloatEntry name must be non-empty");
     mClassName = PL_strdup(aClassName);
     Clear(&mNewStats);
     Clear(&mAllStats);