The hashbang emulation code was "forgetting" to use the default shell

for scripts without a "#!/interpreter" staring line. Now it behaves
like a regular shell or a regular OS's execve() implementation.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82517 13f79535-47bb-0310-9956-ffa450edef68