Minor warning fixes for mingw

modules/juce_audio_devices/native/juce_win32_WASAPI.cpp

@@ -33,8 +33,8 @@ namespace WasapiClasses
 void logFailure (HRESULT hr)
 {
     (void) hr;
-    jassert (hr != 0x800401f0); // If you hit this, it means you're trying to call from
-                                // a thread which hasn't been initialised with CoInitialize().
+    jassert (hr != (HRESULT) 0x800401f0); // If you hit this, it means you're trying to call from
+                                          // a thread which hasn't been initialised with CoInitialize().
 
    #if JUCE_WASAPI_LOGGING
     if (FAILED (hr))

modules/juce_core/zip/juce_ZipFile.cpp

@@ -347,7 +347,7 @@ void ZipFile::init()
             in->setPosition (pos);
             MemoryBlock headerData;
 
-            if (in->readIntoMemoryBlock (headerData, size) == size)
+            if (in->readIntoMemoryBlock (headerData, size) == (size_t) size)
             {
                 pos = 0;