[FT] A problem when rendering a character.

[罗 亮]

Hello,
   When I use freetype 2.1.9 to render a character 't' with the font 
'c:\windows\fonts\arialuni.ttf' which font point size is 12, FT_Get_Glyph 
show me the ace->glyph->advance.x is 4( 0x0004000 >> 6 ). But when I render 
it, the width of the result bitmap is 5.
   I don't know why it occurs, and which value I should use to move the 
pen. Please help me,thanks!
                                                                           
                           Ray

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