Changed COLORREF from int to DWORD (32 bit long), so that it works also on 64bit Windows

lib/windows/windows.nim

@@ -137,7 +137,7 @@ type  # WinDef.h -- Basic Windows Type Definitions
 
   HFILE* = HANDLE
   HCURSOR* = HANDLE # = HICON
-  COLORREF* = int
+  COLORREF* = DWORD
   LPCOLORREF* = ptr COLORREF
 
   POINT* {.final, pure.} = object
@@ -238,7 +238,7 @@ type
   CALTYPE* = int
   CALID* = int
   CCHAR* = char
-  TCOLORREF* = int
+  TCOLORREF* = COLORREF
   WINT* = int32
   PINTEGER* = ptr int32
   PBOOL* = ptr WINBOOL
@@ -22758,12 +22758,12 @@ proc LocalDiscard*(hlocMem: HLOCAL): HLOCAL =
 
 # WinGDI.h
 
-proc GetGValue*(rgb: int32): int8 =
-  result = toU8(rgb shr 8'i32)
+discard """proc GetGValue*(rgb: int32): int8 =
+  result = toU8(rgb shr 8'i32)"""
 proc RGB*(r, g, b: int): COLORREF =
   result = toU32(r) or (toU32(g) shl 8) or (toU32(b) shl 16)
 proc RGB*(r, g, b: range[0 .. 255]): COLORREF =
-  result = r or g shl 8 or b shl 16
+  result = toU32(r) or (toU32(g) shl 8) or (toU32(b) shl 16)
 
 proc PALETTERGB*(r, g, b: range[0..255]): COLORREF =
   result = 0x02000000 or RGB(r, g, b)