- allow sicscron to run with 0 sec interval

sicscron.c

@@ -96,7 +96,7 @@ static int CronTask(void *pData)
     }
     self->tNext += self->iInterval;
     if (now > self->tNext)
-      self->tNext = now + 1;
+      self->tNext = now;
   }
 /*   printf("CronTask return: %d\n", self->iEnd > 0);*/
   if(self->iEnd <= 0){
@@ -165,7 +165,7 @@ int MakeCron(SConnection * pCon, SicsInterp * pSics, void *pData,
 
   /* enough arguments? */
   if (argc < 3) {
-    SCPrintf(pCon, eError, "ERROR: not enough arguments to %s", argv[0]);
+    SCPrintf(pCon, eError, "ERROR: usage: %s <interval> <script>", argv[0]);
     return 0;
   }