Merge branch 'master' into jgrpp

# Conflicts:
#	src/blitter/32bpp_anim.hpp
#	src/blitter/32bpp_base.hpp
#	src/blitter/8bpp_base.hpp
#	src/blitter/null.hpp
#	src/cheat_gui.cpp
#	src/gfx.cpp
#	src/linkgraph/linkgraph.cpp
#	src/spriteloader/grf.cpp
#	src/station_cmd.cpp

src/blitter/32bpp_base.cpp

@@ -170,9 +170,9 @@ void Blitter_32bppBase::ScrollBuffer(void *video, int left, int top, int width,
 	}
 }
 
-int Blitter_32bppBase::BufferSize(int width, int height)
+size_t Blitter_32bppBase::BufferSize(uint width, uint height)
 {
-	return width * height * sizeof(uint32);
+	return sizeof(uint32) * width * height;
 }
 
 void Blitter_32bppBase::PaletteAnimate(const Palette &palette)