[gnome-shell] app: Don't abort if a .desktop file has no Exec= key

[Colin Walters <walters src gnome org>]

commit 37726a4cb69ab54298a3c95ccf469e1ab87ed4b1
Author: Colin Walters <walters verbum org>
Date:   Mon Sep 19 14:07:13 2011 -0400

    app: Don't abort if a .desktop file has no Exec= key
    
    Seen in the wild in nautilus-pastebin-configurator.desktop.

 src/shell-app.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/shell-app.c b/src/shell-app.c
index 7535a81..c813d91 100644
--- a/src/shell-app.c
+++ b/src/shell-app.c
@@ -1171,6 +1171,9 @@ trim_exec_line (const char *str)
 {
   const char *start, *end, *pos;
 
+  if (str == NULL)
+    return NULL;
+
   end = strchr (str, ' ');
   if (end == NULL)
     end = str + strlen (str);