Added pgtk_verify_setup() calls to most create functions lacking them

Rev: src/post_modules/GTK/source/gdkatom.pre:1.3
Rev: src/post_modules/GTK/source/gdkbitmap.pre:1.3
Rev: src/post_modules/GTK/source/gdkcolor.pre:1.3
Rev: src/post_modules/GTK/source/gdkdragcontext.pre:1.3
Rev: src/post_modules/GTK/source/gdkfont.pre:1.2
Rev: src/post_modules/GTK/source/gdkgc.pre:1.2
Rev: src/post_modules/GTK/source/gdkimage.pre:1.3
Rev: src/post_modules/GTK/source/gdkpixmap.pre:1.2
Rev: src/post_modules/GTK/source/gdkrectangle.pre:1.3
Rev: src/post_modules/GTK/source/gdkregion.pre:1.3
Rev: src/post_modules/GTK/source/gdkwindow.pre:1.4
Rev: src/post_modules/GTK/source/gtkbutton.pre:1.2
Rev: src/post_modules/GTK/source/gtkcheckbutton.pre:1.2
Rev: src/post_modules/GTK/source/gtkcheckmenuitem.pre:1.2
Rev: src/post_modules/GTK/source/gtklistitem.pre:1.2
Rev: src/post_modules/GTK/source/gtkmenuitem.pre:1.2
Rev: src/post_modules/GTK/source/gtkradiobutton.pre:1.2
Rev: src/post_modules/GTK/source/gtkradiomenuitem.pre:1.3
Rev: src/post_modules/GTK/source/gtktogglebutton.pre:1.2
Rev: src/post_modules/GTK/source/gtktreeitem.pre:1.2