Avoid overflow in 'last' variable of FindGLXFunction(...)

This 'last' variable used in FindGLXFunction(...) may become negative,
but has been defined as unsigned int resulting in an overflow,
finally resulting in a segfault when accessing _glXDispatchTableStrings[...].
Fixed this by definining it as signed int. 'first' variable also needs to be
defined as signed int. Otherwise condition for while loop fails due to C
implicitly converting signed to unsigned values before comparison.

Cc: <[email protected]>
Signed-off-by: Stefan Dirsch <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>

0 files changed, 0 insertions, 0 deletions