Replace function calls with type casts

[spawnia]

The effect is the same, efficiency is better.

[coveralls]

Coverage increased (+0.009%) to 86.33% when pulling 94eae21 on spawnia:replace-function-calls-with-type-casts into b4142e3 on webonyx:master.

[spawnia]

Those coverage gains 🥇

[simPod]

Is there even any valid use case for using these cast functions? Except things like array_map('floatval', $arr) where it makes sense.

[spawnia]

Is there even any valid use case for using these cast functions? Except things like array_map('floatval', $arr) where it makes sense.

intval() takes a base as its second parameter, but that's about it.

[vladar]

LGTM 👍