Don't crash when trying to close fds for a builtin command

darcs-hash:20071005150106-75c98-292df3863252c1eebd5734a241a2d80e6883f65f.gz

exec.c

@@ -1116,6 +1116,32 @@ void exec( job_t *j )
 								break;
 							}
 	
+							case IO_CLOSE:
+							{
+								/*
+								  FIXME:
+
+								  When
+								  requesting
+								  that
+								  stdin
+								  be
+								  closed,
+								  we
+								  really
+								  don't
+								  do
+								  anything. How
+								  should
+								  this
+								  be
+								  handled?
+								 */
+								builtin_stdin = -1;
+								
+								break;
+							}
+							
 							default:
 							{
 								builtin_stdin=-1;