mtexturepixmapitem: no need to make glwidget current
mtexturepixmapitem: no need to make glwidget current

It should already be current; calling this function here without error
checking can cause problems with some GLX based drivers.

Fixes http://bugs.meego.com/show_bug.cgi?id=2172 on Intel PVR based
platforms.

siraj/mcompositor,nemomobile-graveyard/mcompositor,siraj/mcompositor,siraj/mcompositor,siraj/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor