Fix include for win32.

- Include ignored on Unix (#ifdef Q_OS_WIN)
- Windows is case-insensitive
- Fail when cross-compiling from Unix

src/vlmc.h

@@ -27,7 +27,7 @@
 #include <QtGlobal>
 
 #ifdef Q_OS_WIN
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 #ifdef Q_OS_UNIX