Avoid a crash in "script list" (#521)

This command crashes if the path to the executable directory could not
be found.

diff --git a/client/cmdscript.c b/client/cmdscript.c
index 23163aa98f128918b153c80a8ef26930519ca98c..0d19f49697a4f47304eb4edc338a31be93ed7e9a 100644 (file)
--- a/client/cmdscript.c
+++ b/client/cmdscript.c
@@ -76,8 +76,11 @@ int CmdList(const char *Cmd)
 {
     DIR *dp;
     struct dirent *ep;
-       char script_directory_path[strlen(get_my_executable_directory()) + strlen(LUA_SCRIPTS_DIRECTORY) + 1];
-       strcpy(script_directory_path, get_my_executable_directory());
+       char const * exedir = get_my_executable_directory();
+       if (exedir == NULL)
+           return 0;
+       char script_directory_path[strlen(exedir) + strlen(LUA_SCRIPTS_DIRECTORY) + 1];
+       strcpy(script_directory_path, exedir);
        strcat(script_directory_path, LUA_SCRIPTS_DIRECTORY);
     dp = opendir(script_directory_path);