Handle "non well formed" exception during ZPP

Previously if the "non well formed" notice was converted into an
exception we'd still end up executing the function.

Also drop the

Handle "non well formed" exception during ZPP

Previously if the "non well formed" notice was converted into an
exception we'd still end up executing the function.

Also drop the now unnecessary EG(exception) checks in the engine.

Additionally remote a bogus exception in zend_is_callable: It
should only be writing to error, but not directly throwing.

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