Windows: Open folder chooser only if current folder has no ALD files

src/win/dialog.c

@@ -40,6 +40,15 @@ static int CALLBACK select_game_callback(HWND hwnd, UINT uMsg, LPARAM lParam, LP
 	return 0;
 }
 
+boolean current_folder_has_ald(void) {
+	WIN32_FIND_DATA find_data;
+	HANDLE hFind = FindFirstFile("*.ALD", &find_data);
+	if (hFind == INVALID_HANDLE_VALUE)
+		return FALSE;
+	FindClose(hFind);
+	return TRUE;
+}
+
 boolean select_game_folder(void) {
 	char title[256];
 	LoadString(GetModuleHandle(NULL), IDS_CHOOSE_GAME_FOLDER, title, sizeof(title));

src/win/dialog.h

@@ -24,6 +24,7 @@
 struct inputstring_param;
 struct inputnum_param;
 
+boolean current_folder_has_ald(void);
 boolean select_game_folder(void);
 boolean input_string(struct inputstring_param *p);
 boolean input_number(struct inputnum_param *p);

src/xsystem35.c

@@ -486,7 +486,7 @@ int main(int argc, char **argv) {
 		chdir(argv[2]);
 #endif
 #ifdef _WIN32
-	if (argc == 1) {
+	if (argc == 1 && !current_folder_has_ald()) {
 		if (!select_game_folder())
 			return 0;
 	}