(Faset): Calculate nbytes earlier, to satisfy the now pickier

PARSE_MULTIBYTE_SEQ.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/data.c b/src/data.c
index 5b03f0ebff2..b52aff10819 100644
--- a/src/data.c
+++ b/src/data.c
@@ -2029,13 +2029,15 @@ bool-vector.  IDX starts at 0.  */)
     }
   else if (STRING_MULTIBYTE (array))
     {
-      int idxval_byte, prev_bytes, new_bytes;
+      int idxval_byte, prev_bytes, new_bytes, nbytes;
       unsigned char workbuf[MAX_MULTIBYTE_LENGTH], *p0 = workbuf, *p1;
 
       if (idxval < 0 || idxval >= SCHARS (array))
         args_out_of_range (array, idx);
       CHECK_NUMBER (newelt);
 
+      nbytes = SBYTES (array);
+
       idxval_byte = string_char_to_byte (array, idxval);
       p1 = SDATA (array) + idxval_byte;
       PARSE_MULTIBYTE_SEQ (p1, nbytes - idxval_byte, prev_bytes);
@@ -2044,7 +2046,6 @@ bool-vector.  IDX starts at 0.  */)
         {
           /* We must relocate the string data.  */
           int nchars = SCHARS (array);
-          int nbytes = SBYTES (array);
           unsigned char *str;
 
           str = (nbytes <= MAX_ALLOCA