Moved some more 16-bit functions to user16.c.
A few fixes for -DSTRICT.

diff --git a/controls/icontitle.c b/controls/icontitle.c
index 68b946b..8c0ca32 100644
--- a/controls/icontitle.c
+++ b/controls/icontitle.c
@@ -62,7 +62,7 @@
 HWND ICONTITLE_Create( HWND owner )
 {
     HWND hWnd;
-    HINSTANCE instance = GetWindowLongA( owner, GWL_HINSTANCE );
+    HINSTANCE instance = (HINSTANCE)GetWindowLongA( owner, GWL_HINSTANCE );
     LONG style = WS_CLIPSIBLINGS;
 
     if (!IsWindowEnabled(owner)) style |= WS_DISABLED;
@@ -238,5 +238,3 @@
     }
     return DefWindowProcW( hWnd, msg, wParam, lParam );
 }
-
-