Fix issues discovered by Coverity

- Fix resource leak in InspIRCd::Format()
- Explicitly set NewServices to NULL before the object it points to goes out of scope

src/helperfuncs.cpp

@@ -400,6 +400,8 @@ const char* InspIRCd::Format(va_list &vaList, const char* formatString)
 		va_copy(dst, vaList);
 
 		int vsnret = vsnprintf(&formatBuffer[0], formatBuffer.size(), formatString, dst);
+		va_end(dst);
+
 		if (vsnret > 0 && static_cast<unsigned>(vsnret) < formatBuffer.size())
 		{
 			return &formatBuffer[0];

src/modules.cpp

@@ -550,6 +550,8 @@ void ModuleManager::LoadAll()
 		}
 	}
 
+	this->NewServices = NULL;
+
 	if (!PrioritizeHooks())
 		ServerInstance->Exit(EXIT_STATUS_MODULE);
 }