osasnmpd: start without real OSA devices

Osasnmpd would start without any devices, but refuses to start when all
devices are no real OSA devices.
Start osasnmpd in this case because it re-scans via update_mib_info
whenever the interface data changes.

Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

osasnmpd/ibmOSAMib.c

@@ -95,10 +95,10 @@ void init_ibmOSAMib(void) {
     }
   else if ( osaexp_num == 0 )
     {
-      fprintf( stderr, "init_ibmOSAMib(): bad or no OSA-E devices reported\n"
-		       "check agent log file for more details\n"
-		       "Cannot start subagent...exiting...\n");
-      exit(1);
+      get_time( time_buf );
+      snmp_log( LOG_ERR, "%s init_ibmOSAMib(): none of the %d interfaces is a real "
+			 "OSA-E device - starting subagent anyway\n", time_buf, ifNumber);
+      return;
     } 
   /* end if */