[Realtime][BugFix] Comparison between integer and pointer.

MBsysC/mbs_common/mbs_realtime/realtime/realtime.c

-
 #ifdef REAL_TIME
 
 #include "realtime.h"
@@ -632,7 +631,7 @@ Simu_realtime* init_simu_realtime(MbsData* mbs_data, Realtime_option *options, i
     if (options->flag_visu)
     {
         realtime->ext->visu = init_realtime_visu(options, mbs_data, err);
-        if (err < 0)
+        if (*err < 0)
         {
             mbs_msg("[%d] in init_simu_realtime VISU !! \n", *err);
             return NULL;