Changes

Summary

1. Amiga: Check maxX/Y bounds (details)
2. Amiga: Don't use backfill hooks for tiling (details)
3. Amiga: Release guigfx drawhandle immediately after drawing (details)

Commit 96cae24f6b60e039bb18f86a3b2b630339ac07c8 by chris Amiga: Check maxX/Y bounds
	frontends/amiga/plotters.c (diff)
Commit 4ea78bdea40f4f93e69a66eded438d4ed4deb58f by chris Amiga: Don't use backfill hooks for tiling
	frontends/amiga/plotters.c (diff)
Commit 6729c6fde5123a39c290864394d264d356c1e7d4 by chris Amiga: Release guigfx drawhandle immediately after drawing
	frontends/amiga/bitmap.c (diff)