ja2export is not vendored, we own that + fix errors

stop lying about it by keeping it in ext/
fix three errors in clang-cl

export/src/init_vfs.h

@@ -0,0 +1,33 @@
+#ifndef _INIT_VFS_H_
+#define _INIT_VFS_H_
+
+#include <vfs/Core/vfs_path.h>
+#include <exporter_base.h>
+
+namespace ja2xp
+{
+	class InitVFS
+	{
+	public:
+		static InitVFS& instance();
+
+		void checkParameters(IExporterBase::param_list_t const& params);
+		bool init();
+
+		vfs::Path const& srcPattern();
+		vfs::Path const& dstPattern();
+	private:
+		InitVFS();
+
+		bool has_src, has_dst;
+		bool src_lib, dst_create;
+		vfs::Path src_path, dst_path;
+		vfs::Path src_pattern, dst_pattern;
+	};
+}
+
+//bool InitVFS(vfs::Path const& sSrcPath, vfs::Path const& sDstPath,
+//			 vfs::Path& src_pattern, vfs::Path& dst_pattern,
+//			 bool bSourceAsLib, bool bCreateDstDirectory);
+
+#endif // _INIT_VFS_H_