Fix for [ 1932310 ] security check always fail for windows.

git-svn-id: https://tftpy.svn.sourceforge.net/svnroot/tftpy/trunk@82 63283fd4-ec1e-0410-9879-cb7f675518da

tftpy/TftpServer.py

@@ -289,7 +289,7 @@ class TftpServerHandler(TftpSession):
                 self.filename = os.path.abspath(self.filename)
                 logger.debug("The absolute path is %s" % self.filename)
                 # Security check. Make sure it's prefixed by the tftproot.
-                if re.match(r'%s' % self.root, self.filename):
+                if self.filename.find(self.root) == 0:
                     logger.debug("The path appears to be safe: %s" %
                             self.filename)
                 else: