master f610b4b509: Fix creation of menu items without help text on Haiku

[Po Lu]

branch: master
commit f610b4b509013a6c9ef448385575ade01733559c
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix creation of menu items without help text on Haiku
    
    * src/haiku_support.cc (EmacsMenuItem): Don't mistakenly assume
    help is non-NULL.
---
 src/haiku_support.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index 2411a7b539..3b1a2cfcb3 100644
--- a/src/haiku_support.cc
+++ b/src/haiku_support.cc
@@ -2403,7 +2403,8 @@ public:
     if (key_label)
       key = strdup (key_label);
 
-    this->help = strdup (help);
+    if (help)
+      this->help = strdup (help);
   }
 
   ~EmacsMenuItem ()