[regress/yes-head.sh] shell portability fix.

ChangeLog

@@ -1,6 +1,7 @@
 20030912
  - (tim) [regress/agent-ptrace.sh] sh doesn't like "if ! shell_function; then".
  - (tim) [Makefile.in] only mkdir regress if it does not exist.
+ - (tim) [regress/yes-head.sh] shell portability fix.
 
 20030911
  - (dtucker) [configure.ac] Bug #588, #615: Move other libgen tests to after
@@ -1074,4 +1075,4 @@
  - Fix sshd BindAddress and -b options for systems using fake-getaddrinfo.
    Report from murple@murple.net, diagnosis from dtucker@zip.com.au
 
-$Id: ChangeLog,v 1.2984 2003/09/12 20:02:16 tim Exp $
+$Id: ChangeLog,v 1.2985 2003/09/12 20:21:14 tim Exp $

regress/yes-head.sh

@@ -4,7 +4,7 @@
 tid="yes pipe head"
 
 for p in 1 2; do
-	lines=`${SSH} -$p -F $OBJ/ssh_proxy thishost 'while true;do echo yes;done | head -2000' | (sleep 3 ; wc -l)`
+	lines=`${SSH} -$p -F $OBJ/ssh_proxy thishost 'sh -c "while true;do echo yes;done | head -2000"' | (sleep 3 ; wc -l)`
 	if [ $? -ne 0 ]; then
 		fail "yes|head test failed"
 		lines = 0;