Vincent Povirk : shell32: Include NULL terminators in the lengths used by SHELL_ArgifyW.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: eeeca57072f87d3796a030fba1d690915da6ebc5
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=eeeca57072f87d3796a030fba1d690915da6ebc5

Author: Vincent Povirk <vincent at codeweavers.com>
Date:   Tue Jul 19 13:22:07 2011 -0500

shell32: Include NULL terminators in the lengths used by SHELL_ArgifyW.

---

 dlls/shell32/shlexec.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/dlls/shell32/shlexec.c b/dlls/shell32/shlexec.c
index ff07550..7bbbb2b 100644
--- a/dlls/shell32/shlexec.c
+++ b/dlls/shell32/shlexec.c
@@ -269,7 +269,12 @@ static BOOL SHELL_ArgifyW(WCHAR* out, int len, const WCHAR* fmt, const WCHAR* lp
         }
     }
 
-    *res = '\0';
+    used ++;
+    if (res - out < len)
+        *res = '\0';
+    else
+        out[len-1] = '\0';
+
     TRACE("used %i of %i space\n",used,len);
     if (out_len)
         *out_len = used;