[4/4] gdi32: Implement synthesizing bold glyphs for bitmap fonts. (try 2)

[Akihiro Sagawa]

Try 2:
    - Add some conditions to avoid writing past the end of dst spotted by
Huw Davies.

Signed-off-by: Akihiro Sagawa <sagawa.aki at gmail.com>
---
 dlls/gdi32/freetype.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

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