QSGOpenGLDistanceFieldGlyphCache: fix multiplication result truncation

The type of the expression int * int is int, so truncation has already
happened when the result is assigned to a qint64.

Fix by casting one of the multiplicants to qint64 before performing
the multiplication. This multiplication cannot overflow, because int
is 32-bit on all supported platforms.

The addition of 'size' to the pointer will still truncate the result,
on 32bit platforms, but that check is in itself UB. A follow-up commit
will fix the check, and with it the last truncation to 32bit.

Coverity-Id: 218769
Change-Id: I0d71950695b9743db8c96d825e68bb1e9c47de02
Reviewed-by: Fabian Kosmale <[email protected]>
Reviewed-by: Thiago Macieira <[email protected]>
(cherry picked from commit cacfc1dbb9719c0ef55cff69dad0921ce1405438)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>

0 files changed, 0 insertions, 0 deletions