Avoid generating a warning if $fullname{$file} is undefined

Signed-off-by: Nick Woolley <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: rushkoff

git-cvsexportcommit.perl

@@ -259,7 +259,8 @@
 	    if $file =~ /^no file /
 		&& $status eq 'Up-to-date';
 
-	$cvsstat{$fullname{$file}} = $status;
+	$cvsstat{$fullname{$file}} = $status
+	    if defined $fullname{$file};
       }
     }
 }