Fix syntax error in common.rc

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

common.rc

@@ -707,7 +707,7 @@ _require_user()
 # check that xfs_io, glibc, kernel, and filesystem all (!) support
 # fallocate
 #
-_require_xfs_io_falloc()
+_require_xfs_io_falloc() {
 	testio=`$XFS_IO_PROG -F -f -c "falloc 0 1m" $TEST_DIR/$tmp.io 2>&1`
 	rm -f $TEST_DIR/$tmp.io 2>&1 > /dev/null
 	echo $testio | grep -q "not found" && \