Changes: Fix compilation with Qt 4.7
Changes: Fix compilation with Qt 4.7

RevBy: TrustMe
Details: Initialize all DuiComponentDataPrivate members. Use default constructor for
QString members.

nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch