graceful error in case of non-existing reader backend driver

git-svn-id: https://svn.gnumonks.org/trunk/librfid@1914 e0336214-984f-0b4b-a45f-81c69e1f0ede

diff --git a/src/rfid_reader.c b/src/rfid_reader.c
index af947ac..a8e4001 100644 (file)
--- a/src/rfid_reader.c
+++ b/src/rfid_reader.c
@@ -43,6 +43,8 @@ rfid_reader_open(void *data, unsigned int id)
        }
 
        p = rfid_readers[id];
+       if (!p)
+               return NULL;
 
        return p->open(data);
 }