Implemented HEAP_WINE_CODE16SEG SEGPTR heaps with 16-bit code segments.

include/winnt.h

@@ -24,6 +24,7 @@
 #define HEAP_CREATE_ENABLE_TRACING      0x00020000
 #define HEAP_WINE_SEGPTR                0x01000000  /* Not a Win32 flag */
 #define HEAP_WINE_CODESEG               0x02000000  /* Not a Win32 flag */
+#define HEAP_WINE_CODE16SEG             0x04000000  /* Not a Win32 flag */
 
 /* Processor feature flags.  */
 #define PF_FLOATING_POINT_PRECISION_ERRATA	0

memory/heap.c

@@ -453,8 +453,9 @@ static BOOL32 HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
     if (flags & HEAP_WINE_SEGPTR)
     {
         selector = SELECTOR_AllocBlock( address, totalSize,
-                     (flags & HEAP_WINE_CODESEG) ? SEGMENT_CODE : SEGMENT_DATA,
-                     (flags & HEAP_WINE_CODESEG) != 0, FALSE );
+                           (flags & (HEAP_WINE_CODESEG|HEAP_WINE_CODE16SEG))
+                            ? SEGMENT_CODE : SEGMENT_DATA,
+                           (flags & HEAP_WINE_CODESEG) != 0, FALSE );
         if (!selector)
         {
             WARN(heap, "Could not allocate selector\n" );