Fix tiled backgrounds using height not width
Fix tiled backgrounds using height not width

Fixes issue 3712

Change-Id: I9f55ee2230c0083d14b25c9eda4da10109d57a0f
Reviewed-on: http://gerrit.dmdirc.com/801
Reviewed-by: Shane Mc Cormack <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@dmdirc.com>
Automatic-Compile: Shane Mc Cormack <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@dmdirc.com>

csmith/DMDirc-Plugins,csmith/DMDirc-Plugins,DMDirc/Plugins,DMDirc/Plugins,DMDirc/Plugins,csmith/DMDirc-Plugins,DMDirc/Plugins,DMDirc/Plugins,csmith/DMDirc-Plugins,csmith/DMDirc-Plugins