[php-src] PR #23449: JIT: Fix zend_jit_trace_find_init_fcall_op()

Pull Request: https://github.com/php/php-src/pull/23449 Author: arnaud-lb zend_jit_trace_find_init_fcall_op() tries to find the INIT_FCALL opline corresponding to a ZEND_JIT_TRACE_INIT_CALL record, but it fails to do so in the ZEND_JIT_TRACE_FAKE_INIT_CALL case, for nested calls. The ZEND_JIT_TRACE_FAKE_INIT_CALL case implies that p points to a sequence of ZEND_JIT_TRACE_INIT_CALL trace records. The first loop in zend_jit_trace_find_init_fcall_op() is supposed to find the first opline after the sequence of ZEND_JIT_TRACE_INIT_CALL record, but it mistakenly decrements p after initially incrementing it. As a result p eventually points to an invalid record. It works for non-nested calls because the p->op == ZEND_JIT_TRACE_VM condition is true on the first iteration in that case. This can not lead to a crash or miscompilations, but this results in lost optimization opportunities.