cmd: Fix echo's special ';' handling

[Frédéric Delanoy]

Treated similarly to the ':' case.
Cannot add test case due to a NT4 difference/brokenness that would
imply adding stuff like '@or_broken at ECHO is on.' in exp file for
'echo;@space@' command, and error messages cannot be tested due
to i18n issues.
---
 programs/cmd/builtins.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/programs/cmd/builtins.c b/programs/cmd/builtins.c
index 7f003ed..bbf2920 100644
--- a/programs/cmd/builtins.c
+++ b/programs/cmd/builtins.c
@@ -864,10 +864,13 @@ void WCMD_echo (const WCHAR *command) {
   int count;
   const WCHAR *origcommand = command;
 
-  if (command[0]==' ' || command[0]=='\t' || command[0]=='.' || command[0]==':')
+  if (   command[0]==' ' || command[0]=='\t' || command[0]=='.'
+      || command[0]==':' || command[0]==';')
     command++;
+
   count = strlenW(command);
-  if (count == 0 && origcommand[0]!='.' && origcommand[0]!=':') {
+  if (count == 0 && origcommand[0]!='.' && origcommand[0]!=':'
+                 && origcommand[0]!=';') {
     if (echo_mode) WCMD_output (WCMD_LoadMessage(WCMD_ECHOPROMPT), onW);
     else WCMD_output (WCMD_LoadMessage(WCMD_ECHOPROMPT), offW);
     return;
-- 
1.7.6