[ft] Space versus no glyph

[Ross Crawford]

Hi,

I created a small font that just contains space, digits 0-9, and caps A-Z. 
It is being used as the default font in my program. I want the space to just 
increase the advance, but all undefined characters to generate a warning for 
the user and not generate anything. However I can't seem to find how to tell 
the difference between a char not existing in the charmap, and char 32 
(which has no glyph associated with it).

FT_Load_Char() does not return an error for the non-existant chars, and 
FT_Get_Char_Index() returns 0 for space as well as the non-existant ones. Is 
there a way I can check the charmap directly to determine whether or not a 
given char is mapped?

Thanks

ROSCO