Increase string2ld's buffer size (and fix HINCRBYFLOAT)

The string representation of `long double` may take
up to ~5000 chars (see PR #3745).

Before this fix HINCRBYFLOAT would never overflow (since
the string could not exceed 256 chars). Now it can.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/util.c b/src/util.c
index 66d599190..783bcf83b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -447,7 +447,7 @@ int string2l(const char *s, size_t slen, long *lval) {
  * a double: no spaces or other characters before or after the string
  * representing the number are accepted. */
 int string2ld(const char *s, size_t slen, long double *dp) {
-    char buf[256];
+    char buf[MAX_LONG_DOUBLE_CHARS];
     long double value;
     char *eptr;