* remote.c: Add arg names to prototypes, in a modest effort at

clarification.  Also add prototypes for some new functions.
	* (remote_wait):  Better error reporting for 'T' responses.
	* ser-go32.c (strncasecmp):  Make str1 & str2 be const.
	* (dos_async_init):  Make usage message reflect requested port #.
	* ser-tcp.c (tcp_open):  Terminate hostname properly to prevent
	random hostname lookup failures.  Add nicer message for unknown
	host error.  (wait_for):  Wake up in case of exceptions.  Also,
	restart select() if we got EINTR.
	* ser-unix.c (wait_for):  Restart select() if we got EINTR.
	* serial.c: (serial_close):  Clean up code.

gdb/serial.c

@@ -116,11 +116,14 @@ serial_close(scb)
 {
   last_serial_opened = NULL;
 
-  if (scb != NULL)
-    {
-      scb->ops->close(scb);
-      free(scb);
-    }
+/* This is bogus.  It's not our fault if you pass us a bad scb...!  Rob, you
+   should fix your code instead.  */
+
+  if (!scb)
+    return;
+
+  scb->ops->close(scb);
+  free(scb);
 }
 
 #if 0