Fix use of uninitialized variable in inf_text_gtk_view_user_invalidate_user_area
Fix use of uninitialized variable in inf_text_gtk_view_user_invalidate_user_area

The bug manifests itself when show_remote_cursors and show_remote_selections
evaluate to FALSE and show_remote_current_lines evaluates to TRUE.

Usual symptoms are crashes.

tyll/libinfinity,gobby/libinfinity,tyll/libinfinity,tyll/libinfinity,gobby/libinfinity,gobby/libinfinity