patch 7.4.1870
Problem: One more Win64 compiler warning.
Solution: Change declared argument type. (Ken Takata)
diff --git a/src/if_mzsch.c b/src/if_mzsch.c
index 1861df4..37cebc5 100644
--- a/src/if_mzsch.c
+++ b/src/if_mzsch.c
@@ -849,7 +849,7 @@
static int mz_threads_allow = 0;
#if defined(FEAT_GUI_W32)
-static void CALLBACK timer_proc(HWND, UINT, UINT, DWORD);
+static void CALLBACK timer_proc(HWND, UINT, UINT_PTR, DWORD);
static UINT timer_id = 0;
#elif defined(FEAT_GUI_GTK)
# if GTK_CHECK_VERSION(3,0,0)