IBM1130: Force update of GUI prior to reading commands

This gets changed state displayed in GUI for register updates, etc..

as mentioned in #453 point 1.

Ibm1130/ibm1130_gui.c

@@ -1609,6 +1609,7 @@ char *read_cmdline (char *ptr, int size, FILE *stream)
         atexit(read_atexit);
     }
 
+    update_gui(TRUE);
     SetEvent(hCmdReadEvent);                                /* let read thread get one line */
     WaitForSingleObject(hCmdReadyEvent, INFINITE);          /* wait for read thread or GUI to respond */
     strncpy(ptr, cmdbuffer, MIN(size, sizeof(cmdbuffer)));  /* copy line to caller's buffer */