* configure.in: Add switch --disable-gdiplus-loaders that disables
building of the GDI+ loaders.
- When including loaders in the gdk-pixbuf library, either build in
- all the GDI+ ones or none of them. Use just -DINCLUDE_gdiplus in
- $INCLUDED_LOADER_DEFINE to signal building them in.
+ When including loaders in the gdk-pixbuf library, and building
+ GDI+ loaders, either build in all the GDI+ loaders or none of
+ them. Use just -DINCLUDE_gdiplus in $INCLUDED_LOADER_DEFINE to
+ signal building them in.
Add Automake conditionals BUILD_GDIPLUS_LOADERS to indicate
whether the GDI+ loaders should be built and INCLUDE_GDIPLUS to