Sets the current text encoding format. This will affect all parts of
Allegro, wherever you see a function that returns a char *, or takes a
char * as a parameter. `type' should be one of these values:
U_ASCII - fixed size, 8-bit ASCII characters
U_ASCII_CP - alternative 8-bit codepage (see set_ucodepage())
U_UNICODE - fixed size, 16-bit Unicode characters
U_UTF8 - variable size, UTF-8 format Unicode characters
Although you can change the text format on the fly, this is not a good
idea. Many strings, for example the names of your hardware drivers and
any language translations, are loaded when you call allegro_init(), so if
you change the encoding format after this, they will be in the wrong
format, and things will not work properly. Generally you should only call
set_uformat() once, before allegro_init(), and then leave it on the same
setting for the duration of your program.
