- Reverting: pcntl_signal() returning NULL when passing wrong parameters

# Wow, my first commit and I broke something, sorry about that :(

ext/pcntl/pcntl.c

@@ -757,7 +757,7 @@ PHP_FUNCTION(pcntl_signal)
 	zend_bool restart_syscalls = 1;
 
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lz|b", &signo, &handle, &restart_syscalls) == FAILURE) {
-		RETURN_FALSE;
+		return;
 	}
 
 	if (!PCNTL_G(spares)) {

ext/pcntl/tests/pcntl_signal.phpt

@@ -25,7 +25,7 @@ echo "ok\n";
 signal dispatched
 
 Warning: pcntl_signal() expects at least 2 parameters, 0 given in %s
-bool(false)
+NULL
 bool(true)
 
 Warning: pcntl_signal(): Invalid value for handle argument specified in %s