autofs-5.0.7 - add null check in read_one()

From: Ian Kent <raven@themaw.net>

The pointter p shouldn't be null here but add a chack anyway.

---

 modules/lookup_file.c |    6 ++++--

 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/modules/lookup_file.c b/modules/lookup_file.c

index 65e5ee6..2836996 100644

--- a/modules/lookup_file.c

+++ b/modules/lookup_file.c

@@ -302,8 +302,10 @@ static int read_one(unsigned logopt, FILE *f, char *key, unsigned int *k_len, ch

 				if (gotten == got_real || gotten == getting)

 					goto got_it;

 			} else if (mapent_len < MAPENT_MAX_LEN) {

-				mapent_len++;

-				*(p++) = ch;

+				if (p) {

+					mapent_len++;

+					*(p++) = ch;

+				}

 				nch = getc(f);

 				if (nch == EOF &&

 				   (gotten == got_real || gotten == getting))