Change return type of try_emit_* methods to bool.

Ian Romanick explained (Message-Id: <4E528973.6080902@freedesktop.org>),
that the return type of non-API methods shouldn't use GLboolean but a
standard C++ bool.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Bryan Cain <bryancain3@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Kai Wasserbäch <kai@dev.carbon-project.org>
2 files changed