Make shadow_logfd and Prog not extern

Closes #444
Closes #465

Signed-off-by: Serge Hallyn <serge@hallyn.com>

libmisc/pam_pass.c

@@ -46,11 +46,13 @@
 #include "defines.h"
 #include "pam_defs.h"
 #include "prototypes.h"
+#include "shadowlog.h"
 
 void do_pam_passwd (const char *user, bool silent, bool change_expired)
 {
 	pam_handle_t *pamh = NULL;
 	int flags = 0, ret;
+	FILE *shadow_logfd = log_get_logfd();
 
 	if (silent)
 		flags |= PAM_SILENT;