fix dispatch signal event check for compatibility with the contract interface
fix dispatch signal event check for compatibility with the contract interface

sgehrig/symfony,HeahDude/symfony,d-ph/symfony,symfony/symfony,d-ph/symfony,xabbuh/symfony,xabbuh/symfony,curry684/symfony,sgehrig/symfony,nicolas-grekas/symfony,symfony/symfony,d-ph/symfony,sgehrig/symfony,symfony/symfony,derrabus/symfony,derrabus/symfony,sgehrig/symfony,symfony/symfony,nicolas-grekas/symfony,derrabus/symfony,xabbuh/symfony,nicolas-grekas/symfony,curry684/symfony,derrabus/symfony,d-ph/symfony,HeahDude/symfony,nicolas-grekas/symfony,curry684/symfony,curry684/symfony,xabbuh/symfony,HeahDude/symfony,HeahDude/symfony