system/sdltrs: Fixed to build against gcc-4.7
system/sdltrs: Fixed to build against gcc-4.7

Signed-off-by: Niels Horn <38c586a0c2b0a74c93bbf02c1552e704a9deff0d@slackbuilds.org>

panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds