Segmentation fault in git-shell & symlink instead of script post-update in git repository

Hello, when I tried to install git, I found some bug in git-shell (shell.c). If you don't give two parameters in argv[2], program ends by segfault. There is a problem solution.

*** shell.c     2005-11-26 01:35:20.000000000 +0100
--- shell.c.new 2005-12-01 19:42:29.000000000 +0100
*************** int main(int argc, char **argv)
*** 42,48 ****
                char *arg;
                if (strncmp(cmd->name, prog, len))
                        continue;
!               arg = NULL;
                switch (prog[len]) {
                case '\0':
                        arg = NULL;
--- 42,48 ----
                char *arg;
                if (strncmp(cmd->name, prog, len))
                        continue;
!               arg = "";
                switch (prog[len]) {
                case '\0':
                        arg = NULL;

I have /home/scm mounted as noexec. I had a problem with post-update. I remove it and replaced with symlink to current program. So that works.