default_link remote-host bug

In the remote-host case, default_link refers to a variable nobjects
without initializing it, leading to

ERROR: can't read "nobjects": no such variable

when running GDB's gdb.asm/asm-source.exp in a remote-host
environment.  The following patch fixes this.

2007-12-07  Joseph Myers  <[email protected]>

	* lib/target.exp (default_link): Initialize nobjects before use.

Index: lib/target.exp
===================================================================
RCS file: /sources/dejagnu/dejagnu/lib/target.exp,v
retrieving revision 1.24
diff -u -r1.24 target.exp
--- lib/target.exp	22 May 2006 06:01:35 -0000	1.24
+++ lib/target.exp	7 Dec 2007 01:39:10 -0000
@@ -758,6 +758,7 @@
     }
 
     if {[is_remote host]} {
+	set nobjects ""
 	foreach x $objects {
 	    set nobjects "$nobjects [remote_download host $x]"
 	}

-- 
Joseph S. Myers
[email protected]