ext/session: Fix implicit conversion warning

Author: arshidkv12

ext/session/mod_files.c

@@ -266,7 +266,7 @@ static zend_result ps_files_write(ps_files *data, zend_string *key, zend_string
 #endif
 
 	if (n != ZSTR_LEN(val)) {
-		if (n == (size_t)-1) {
+		if (n == (ssize_t)-1) {
 			php_error_docref(NULL, E_WARNING, "Write failed: %s (%d)", strerror(errno), errno);
 		} else {
 			php_error_docref(NULL, E_WARNING, "Write wrote less bytes than requested");

ext/session/mod_user.c

@@ -25,7 +25,7 @@ const ps_module ps_mod_user = {
 
 static void ps_call_handler(zval *func, uint32_t argc, zval *argv, zval *retval)
 {
-	int i;
+	uint32_t i;
 	if (PS(in_save_handler)) {
 		PS(in_save_handler) = false;
 		ZVAL_UNDEF(retval);