diff options
Diffstat (limited to 'src/gsm/gsm23003.c')
| -rw-r--r-- | src/gsm/gsm23003.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/gsm/gsm23003.c b/src/gsm/gsm23003.c index 004e20ff..3c09acac 100644 --- a/src/gsm/gsm23003.c +++ b/src/gsm/gsm23003.c @@ -33,6 +33,8 @@ static bool is_n_digits(const char *str, int min_digits, int max_digits) /* Use unsigned char * to avoid a compiler warning of * "error: array subscript has type 'char' [-Werror=char-subscripts]" */ const unsigned char *pos = (const unsigned char *)str; + if (!pos) + return min_digits < 1; for (len = 0; *pos && len < max_digits; len++, pos++) if (!isdigit(*pos)) return false; |