import fix for ITS#4479

CHANGES

@@ -12,6 +12,7 @@ OpenLDAP 2.3.21 Release
 	Fixed slapd connection index bound check (ITS#4449)
 	Fixed slapd connection cleanup (ITS#4465)
 	Fixed slapd slap_realloc misuse (ITS#4477)
+	Fixed slapd size limit check when pagesize=1 (ITS#4479)
 	Fixed slapd-bdb/hdb cache issue (ITS#4439)
 	Fixed slapd-ldbm crash on modify bug (ITS#4464)
 	Fixed slapd-ldap potential bind deadlock (ITS#4409)

servers/slapd/limits.c

@@ -1233,6 +1233,9 @@ limits_check( Operation *op, SlapReply *rs )
 						return -1;
 					}
 					op->ors_slimit = slimit;
+
+				} else if ( slimit == 0 ) {
+					op->ors_slimit = 0;
 				}
 
 			} else {