Commit 217fe27b authored by unknown's avatar unknown

Backport from 5.0

parent 4e252340
......@@ -274,7 +274,7 @@ uint my_well_formed_len_mb(CHARSET_INFO *cs,
my_wc_t wc;
int mblen;
if ((mblen= cs->cset->mb_wc(cs, &wc, (uchar*) b, (uchar*) e)) <0)
if ((mblen= cs->cset->mb_wc(cs, &wc, (uchar*) b, (uchar*) e)) <= 0)
break;
b+= mblen;
pos--;
......
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