Add comment to make this clear.

Signed-off-by: Adam Treat <treat.adam@gmail.com>

gpt4all-chat/chat.cpp

@@ -243,7 +243,7 @@ void Chat::setModelInfo(const ModelInfo &modelInfo)
     if (m_modelInfo == modelInfo && isModelLoaded())
         return;
 
-    m_modelLoadingPercentage = std::numeric_limits<float>::min();
+    m_modelLoadingPercentage = std::numeric_limits<float>::min(); // small non-zero positive value
     emit isModelLoadedChanged();
     m_modelLoadingError = QString();
     emit modelLoadingErrorChanged();

gpt4all-chat/chatllm.cpp

@@ -222,7 +222,7 @@ bool ChatLLM::loadModel(const ModelInfo &modelInfo)
 #endif
         delete m_llModelInfo.model;
         m_llModelInfo.model = nullptr;
-        emit modelLoadingPercentageChanged(std::numeric_limits<float>::min());
+        emit modelLoadingPercentageChanged(std::numeric_limits<float>::min()); // small non-zero positive value
     } else if (!m_isServer) {
         // This is a blocking call that tries to retrieve the model we need from the model store.
         // If it succeeds, then we just have to restore state. If the store has never had a model