make the check for GMT offset occur each time through the loop,

	in case a switch between standard and daylight savings time
	occurred.  (correction to previous code courtesy of Uli Zappe.)

PR:		24417
Submitted by:	Uli Zappe <uli ritual.org>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@103973 13f79535-47bb-0310-9956-ffa450edef68