wasm: Don't reclaim pointer lock when cancelled. #647

Job	Run time
incremental-mutants	0s
build (ubuntu, stable, locked, true)	13m 1s
miri	1m 19s
build (windows, stable, locked, false)	25m 12s
deny	48s
build (macos, stable, locked, false)	10m 43s
no_std	27s
build (ubuntu, nightly, locked, false)	12m 29s
build (ubuntu, beta, locked, false)	12m 51s
build (ubuntu, stable, latest, false)	12m 47s
build (ubuntu, stable, minimal, false)	13m 14s
features	31m 35s
deploy	4s
fuzz	15m 30s
	2h 30m 0s

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