winetest: Fix dialog prototypes.
diff --git a/programs/winetest/gui.c b/programs/winetest/gui.c
index a75d1e8..b738679 100644
--- a/programs/winetest/gui.c
+++ b/programs/winetest/gui.c
@@ -323,7 +323,7 @@
     return CallWindowProcA (DefEditProc, hwnd, msg, wParam, lParam);
 }
 
-static BOOL CALLBACK
+static INT_PTR CALLBACK
 AskTagProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     int len;
@@ -376,7 +376,7 @@
     return MBdefault (va_arg (ap, int));
 }
 
-static BOOL CALLBACK
+static INT_PTR CALLBACK
 AboutProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     switch (msg) {
@@ -390,7 +390,7 @@
     return FALSE;
 }
 
-static BOOL CALLBACK
+static INT_PTR CALLBACK
 DlgProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     switch (msg) {