Allow using os.* constants for seeking

Author: Ayuto

src/core/modules/filesystem/filesystem.cpp

@@ -176,10 +176,10 @@ void SourceFile::Close()
 	}
 }
 
-void SourceFile::Seek(int pos, FileSystemSeek_t seekType)
+void SourceFile::Seek(int pos, int seekType)
 {
 	CheckClosed();
-	filesystem->Seek(m_handle, pos, seekType);
+	filesystem->Seek(m_handle, pos, (FileSystemSeek_t) seekType);
 }
 
 unsigned int SourceFile::Tell()

src/core/modules/filesystem/filesystem.h

@@ -47,7 +47,7 @@ class SourceFile
 	PyObject*		Read(int size=-1);
 	int				Write(object data);
 	void			Close();
-	void			Seek(int pos, FileSystemSeek_t seekType=FILESYSTEM_SEEK_HEAD);
+	void			Seek(int pos, int seekType=FILESYSTEM_SEEK_HEAD);
 	unsigned int	Tell();
 	unsigned int	Size();
 	void			Flush();

src/core/modules/filesystem/filesystem_wrap.cpp

@@ -112,7 +112,6 @@ void export_source_file(scope _filesystem)
 		&SourceFile::Close
 	);
 
-	// TODO Allow os.* constants?
 	_SourceFile.def(
 		"seek", 
 		&SourceFile::Seek,