Git commits in Moodle 1.7.4 by stronk7

commit abc597e27bccacfd9e97e660136aa5749b877188
Author: stronk7 <stronk7>
Date:   Tue, 01 Jan 2008 20:28:19 +0900
Tag:    v1.7.4

Better behaviour for "-" course searches under MSSQL and Oracle. MDL-7312

commit e21492da151d0d2cdc1fe322871a3ba87027c9df
Author: stronk7 <stronk7>
Date:   Sat, 29 Dec 2007 03:37:50 +0900
Tag:    v1.7.4

Prevent race condition in event creation. MDL-5956. Credit goes to Penny, Luke and Martin @ Catalyst.