Correct OpenAL if-expression in CMakeLists.txt
Correct OpenAL if-expression in CMakeLists.txt

bdonlan/openc2e,crystalline/openc2e,ccdevnet/openc2e,ccdevnet/openc2e,ccdevnet/openc2e,bdonlan/openc2e,crystalline/openc2e,ccdevnet/openc2e,ccdevnet/openc2e,bdonlan/openc2e,bdonlan/openc2e,crystalline/openc2e,ccdevnet/openc2e,crystalline/openc2e,crystalline/openc2e