fixed bugs: initialization in einkfb.c, cache aging

einkfb.c

@@ -169,7 +169,7 @@ static int blitToFrameBuffer(lua_State *L) {
 	uint8_t *fbptr = (uint8_t*)(fb->data + 
 			ydest * fb->finfo.line_length + 
 			xdest / 2);
-	uint8_t *bbptr = (uint32_t*)(bb->data +
+	uint8_t *bbptr = (uint8_t*)(bb->data +
 			yoffs * bb->w / 2 +
 			xoffs / 2 );
 

tilecache.lua

@@ -11,12 +11,12 @@ function cacheclaim(size)
 		return false
 	end
 	repeat
-		for k, v in pairs(cache) do
+		for k, _ in pairs(cache) do
-			if v.age > 0 then
+			if cache[k].age > 0 then
 				print("aging slot="..k)
-				v.age = v.age - 1
+				cache[k].age = cache[k].age - 1
 			else
-				cache_current_memsize = cache_current_memsize - v.size
+				cache_current_memsize = cache_current_memsize - cache[k].size
 				cache[k] = nil
 				break -- out of for loop
 			end