Digging should not consider the cursor-hand

[Chakravanti]

it's wasteful. Doubly so now with limited resources.

[theTrav]

Alternatively, left click with something in your hand means "try to drop this in that specific spot" rather than just dump it, make ctrl click or something dump it where you're standing.

Chaks solution is one I like more though.

[Potjeh]

But yours fixes the problem of catching a bigger fish than your inventory can handle.