SDL: winrt: Fixed incorrect code in a Windows Phone #ifdef.

From 7e88e772d7cbba3d7ea4d79210ec427fa94ba870 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Wed, 4 Aug 2021 02:30:47 -0400
Subject: [PATCH] winrt: Fixed incorrect code in a Windows Phone #ifdef.

---
 src/video/winrt/SDL_winrtpointerinput.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/video/winrt/SDL_winrtpointerinput.cpp b/src/video/winrt/SDL_winrtpointerinput.cpp
index 1639083f0..26d215078 100644
--- a/src/video/winrt/SDL_winrtpointerinput.cpp
+++ b/src/video/winrt/SDL_winrtpointerinput.cpp
@@ -122,7 +122,8 @@ WINRT_GetSDLButtonForPointerPoint(Windows::UI::Input::PointerPoint ^pt, Uint8 *b
     using namespace Windows::UI::Input;
 
 #if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
-    return SDL_BUTTON_LEFT;
+    *button = SDL_BUTTON_LEFT;
+    return SDL_TRUE;
 #else
     switch (pt->Properties->PointerUpdateKind)
     {