* src/truetype/ttgload.c (TT_Hint_Glyph): More mostly cosmetic update.

This is a follow-up to commit 49c74ac0

, which creates a new local variable
"exec = loader->exec", and shortening a lot of "loader->exec".  This commit
does two more such changes missed in that first commit.

Signed-off-by: Hin-Tak Leung <htl10@users.sourceforge.net>