ask for LC_* in addition to LANG if weird spacing errors crop up. add

ask for LC_* in addition to LANG if weird spacing errors crop up. add

* README: ask for LC_* in addition to LANG if weird spacing errors crop up.
* src/vteconv.c,src/vteconv.h: add wrappers for _vte_conv which weed out some
	compiler warnings.
* src/iso2022.c: use _vte_conv_cu instead of _vte_conv.
* src/trie.c: use _vte_conv_cu instead of _vte_conv.
* src/vte.c: give _vte_terminal_fudge_pango_colors a return type again.
* src/vtebg.c: ifdef out vte_bg_source_name, which is unused.
* src/vtebg.c,src/vterdb.c: wrap calls to gdk_property_get to weed out some
	compiler warnings.