contextsListhContext_seeker(): avoid a potential crash if NULL values are used
contextsListhContext_seeker(): avoid a potential crash if NULL values are used

src/winscard_svc.c:90:22: warning: Dereference of null pointer
        if (currentContext->hContext == *(int32_t *)key)
                            ^
src/winscard_svc.c:90:34: warning: Dereference of null pointer
        if (currentContext->hContext == *(int32_t *)key)
                                        ^


git-svn-id: f2d781e409b7e36a714fc884bb9b2fc5091ddd28@5539 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