fix some queries with columns beginning with limit would fail

dbdimp.c

@@ -475,8 +475,8 @@ static char *parse_params(
         it would be good to be able to handle any number of cases and orders
       */
       if (((*statement_ptr == ' ') || (*statement_ptr == '\n') || (*statement_ptr == '\t')) &&
-          (!strncmp(statement_ptr+1, "limit ", 5) ||
-           !strncmp(statement_ptr+1, "LIMIT ", 5)))
+          (!strncmp(statement_ptr+1, "limit ", 6) ||
+           !strncmp(statement_ptr+1, "LIMIT ", 6)))
       {
         limit_flag = 1;
       }

t/35limit.t

@@ -23,23 +23,23 @@ eval {$dbh= DBI->connect($test_dsn, $test_user, $test_password,
 if ($@) {
     plan skip_all => "no database connection";
 }
-plan tests => 115;
+plan tests => 117;
 
 ok(defined $dbh, "Connected to database");
 
 ok($dbh->do("DROP TABLE IF EXISTS dbd_mysql_t35"), "making slate clean");
 
-ok($dbh->do("CREATE TABLE dbd_mysql_t35 (id INT(4), name VARCHAR(64), name_limit VARCHAR(64))"), "creating table");
+ok($dbh->do("CREATE TABLE dbd_mysql_t35 (id INT(4), name VARCHAR(64), name_limit VARCHAR(64), limit_by VARCHAR(64))"), "creating table");
 
-ok(($sth = $dbh->prepare("INSERT INTO dbd_mysql_t35 VALUES (?,?,?)")));
+ok(($sth = $dbh->prepare("INSERT INTO dbd_mysql_t35 VALUES (?,?,?,?)")));
 
 for my $i (0..99) {
   my @chars = grep !/[0O1Iil]/, 0..9, 'A'..'Z', 'a'..'z';
   my $random_chars = join '', map { $chars[rand @chars] } 0 .. 16;
 
   # save these values for later testing
   $testInsertVals->{$i} = $random_chars;
-  ok(($rows = $sth->execute($i, $random_chars, $random_chars)));
+  ok(($rows = $sth->execute($i, $random_chars, $random_chars, $random_chars)));
 }
 
 ok($sth = $dbh->prepare("SELECT * FROM dbd_mysql_t35 LIMIT ?, ?"),
@@ -53,6 +53,11 @@ ok( (defined($array_ref = $sth->fetchall_arrayref) &&
 
 ok(@$array_ref == 50);
 
+ok($sth = $dbh->prepare("SELECT * FROM dbd_mysql_t35 WHERE limit_by > ?"),
+  "testing prepare of select statement with started by 'limit' column");
+
+ok($sth->execute("foobar"), 'testing exec of bind vars for placeholder');
+
 ok($sth->finish);
 
 ok($dbh->do("UPDATE dbd_mysql_t35 SET name_limit = ? WHERE id = ?", undef, "updated_string", 1));