segfault-resistant seqcode check

diff --git a/org.glite.lb.state-machine/src/process_event.c b/org.glite.lb.state-machine/src/process_event.c
index 264ae9b..80bd4ca 100644 (file)
--- a/org.glite.lb.state-machine/src/process_event.c
+++ b/org.glite.lb.state-machine/src/process_event.c
@@ -243,7 +243,7 @@ static int badEvent(intJobStat *js UNUSED_VAR, edg_wll_Event *e, int ev_seq UNUS
 
 #define USABLE_BRANCH(fine_res) ((fine_res) != RET_TOOOLD && (fine_res) != RET_BADBRANCH)
 #define LRMS_STATE(state) ((state) == EDG_WLL_JOB_RUNNING || (state) == EDG_WLL_JOB_DONE)
-#define PARSABLE_SEQCODE(code) (component_seqcode((code),0) >= 0)
+#define PARSABLE_SEQCODE(code) ((code) && component_seqcode((code),0) >= 0)
 
 static int processEvent_glite(intJobStat *js, edg_wll_Event *e, int ev_seq, int strict, char **errstring)
 {