Rémi Bernon : win32u: Avoid reallocating rawinput device array with zero size.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b5ed53899337660c3fad7bd4023b84eb84eb96f7
URL:    https://gitlab.winehq.org/wine/wine/-/commit/b5ed53899337660c3fad7bd4023b84e...

Author: Rémi Bernon <rbernon(a)codeweavers.com>
Date:   Fri Aug  5 15:49:17 2022 +0200

win32u: Avoid reallocating rawinput device array with zero size.

It actually frees the pointer.

---

 dlls/win32u/rawinput.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dlls/win32u/rawinput.c b/dlls/win32u/rawinput.c
index 8e3f3ace15a..44951522442 100644
--- a/dlls/win32u/rawinput.c
+++ b/dlls/win32u/rawinput.c
@@ -856,6 +856,12 @@ BOOL WINAPI NtUserRegisterRawInputDevices( const RAWINPUTDEVICE *devices, UINT d
 
     pthread_mutex_lock( &rawinput_mutex );
 
+    if (!registered_device_count && !device_count)
+    {
+        pthread_mutex_unlock( &rawinput_mutex );
+        return TRUE;
+    }
+
     size = (SIZE_T)device_size * (registered_device_count + device_count);
     registered_devices = realloc( registered_devices, size );
     if (registered_devices) for (i = 0; i < device_count; ++i) register_rawinput_device( devices + i );