Make atomic_flag_test_and_set_explicit return a dummy value
Make atomic_flag_test_and_set_explicit return a dummy value

[reviewed by brad] 

gcc complains about a value computed is note used if we don't do this...


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@22904 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

CoryMcCartan/chapel,hildeth/chapel,sungeunchoi/chapel,hildeth/chapel,chizarlicious/chapel,sungeunchoi/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,sungeunchoi/chapel,sungeunchoi/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,hildeth/chapel,CoryMcCartan/chapel