GOB: Add constants for different surfaces/sprites

Add
static const int kFrontSurface   = 20;
static const int kBackSurface    = 21;
static const int kAnimSurface    = 22;
static const int kCursorSurface  = 23;
static const int kCaptureSurface = 30;
to class Draw and substitute the raw numbers in other files with
those aliases, for readability.

svn-id: r51852

1 files changed, 1 insertions, 1 deletions

diff --git a/engines/gob/hotspots.cpp b/engines/gob/hotspots.cpp
index abdf513393..396d9f0a22 100644
--- a/engines/gob/hotspots.cpp
+++ b/engines/gob/hotspots.cpp
@@ -2082,7 +2082,7 @@ void Hotspots::getTextCursorPos(const Font &font, const char *str,
 }
 
 void Hotspots::fillRect(uint16 x, uint16 y, uint16 width, uint16 height, uint16 color) const {
-	_vm->_draw->_destSurface  = 21;
+	_vm->_draw->_destSurface  = Draw::kBackSurface;
 	_vm->_draw->_destSpriteX  = x;
 	_vm->_draw->_destSpriteY  = y;
 	_vm->_draw->_spriteRight  = width;