win32: pthread_cond_wait should return a value

This value is not checked, but it must return to match POSIX

Signed-off-by: Greg Funni <gfunni234@gmail.com>

Author: LumioseSil

compat/win32/pthread.h

@@ -34,7 +34,7 @@ typedef int pthread_mutexattr_t;
 
 #define pthread_cond_t CONDITION_VARIABLE
 
-#define pthread_cond_init(a,b) InitializeConditionVariable((a))
+#define pthread_cond_init(a,b) return_0((InitializeConditionVariable((a)), 0))
 #define pthread_cond_destroy(a) do {} while (0)
 #define pthread_cond_wait(a,b) return_0(SleepConditionVariableCS((a), (b), INFINITE))
 #define pthread_cond_signal WakeConditionVariable