[nostalgia] Make Windows builds of player and studio WIN32 apps

src/nostalgia/studio/CMakeLists.txt

@@ -1,7 +1,7 @@
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 add_executable(
-	nostalgia-studio MACOSX_BUNDLE
+	nostalgia-studio WIN32 MACOSX_BUNDLE
 		main.cpp
 )
 

src/nostalgia/studio/main.cpp

@@ -7,7 +7,11 @@
 
 #include <studioapp/studioapp.hpp>
 
+#ifdef _WIN32
+int WinMain(int argc, const char **argv) {
+#else
 int main(int argc, const char **argv) {
+#endif
 	nostalgia::registerKeelModules();
 	nostalgia::registerStudioModules();
 	return studio::main("Nostalgia Studio", ".nostalgia", argc, argv);