git-imap-send: Allow the program to be run from subdirectories of a git tree

Call setup_git_directory_gently to allow git-imap-send to be used from
subdirectories of a git tree.

Signed-off-by: Robert Shearman <robertshearman@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

imap-send.c

@@ -1292,10 +1292,12 @@ main(int argc, char **argv)
 	int ofs = 0;
 	int r;
 	int total, n = 0;
+	int nongit_ok;
 
 	/* init the random number generator */
 	arc4_init();
 
+	setup_git_directory_gently(&nongit_ok);
 	git_config(git_imap_config, NULL);
 
 	if (!imap_folder) {