fix 2 compilation warnings
fix 2 compilation warnings

winscard_svc.c: In function ‘CreateContextThread’:
winscard_svc.c:146: warning: comparison between signed and unsigned
winscard_svc.c: In function ‘MSGAddHandle’:
winscard_svc.c:856: warning: comparison between signed and unsigned


git-svn-id: f2d781e409b7e36a714fc884bb9b2fc5091ddd28@4721 0ce88b0d-b2fd-0310-8134-9614164e65ea

vicamo/pcsc-lite-android,vicamo/pcsc-lite-android,vicamo/pcsc-lite-android,vicamo/pcsc-lite-android,vicamo/pcsc-lite-android