Avoid a potential crash if NULL values are used
Avoid a potential crash if NULL values are used

src/winscard_clnt.c:226:27: warning: Dereference of null pointer
        if (channelMap->hCard == *(SCARDHANDLE *)key)
                                 ^
src/winscard_clnt.c:226:18: warning: Dereference of null pointer
        if (channelMap->hCard == *(SCARDHANDLE *)key)
                        ^
src/winscard_clnt.c:260:18: warning: Dereference of null pointer
        if (contextMap->hContext == *(SCARDCONTEXT *) key)
                        ^
src/winscard_clnt.c:260:30: warning: Dereference of null pointer
        if (contextMap->hContext == *(SCARDCONTEXT *) key)
                                    ^


git-svn-id: f2d781e409b7e36a714fc884bb9b2fc5091ddd28@5537 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