mingw-w64: remove dependency on ucrtbased

CMakeLists.txt

@@ -437,10 +437,6 @@ if(NOT MSVC)
 	endif()
 
 	include(CheckSymbolExists)
-	check_symbol_exists(_UCRT "windows.h" UCRT)
-	if (UCRT)
-		link_libraries("$<$<CONFIG:Debug>:ucrtbased>")
-	endif()
 
 	add_compile_definitions("$<$<CONFIG:Debug>:_DEBUG>")
 

Windows/main.cpp

@@ -899,7 +899,7 @@ static void WinMainInit() {
 
 	EnableCrashingOnCrashes();
 
-#ifdef _DEBUG
+#if defined(_DEBUG) && defined(_MSC_VER)
 	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
 #endif
 	PROFILE_INIT();