[fusl] clang-format fusl

fusl/src/thread/sem_trywait.c

 #include <semaphore.h>
 #include "pthread_impl.h"
 
-int sem_trywait(sem_t *sem)
-{
-        int val;
-        while ((val=sem->__val[0]) > 0) {
-                int new = val-1-(val==1 && sem->__val[1]);
-                if (a_cas(sem->__val, val, new)==val) return 0;
-        }
-        errno = EAGAIN;
-        return -1;
+int sem_trywait(sem_t* sem) {
+  int val;
+  while ((val = sem->__val[0]) > 0) {
+    int new = val - 1 - (val == 1 && sem->__val[1]);
+    if (a_cas(sem->__val, val, new) == val)
+      return 0;
+  }
+  errno = EAGAIN;
+  return -1;
 }