minor #10306 [Validator] Improve condition in if statement (nicoweb)

This PR was merged into the 3.4 branch.

Discussion
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[Validator] Improve condition in if statement

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9919dcc [Validator] fix condition in if statement

Author: javiereguiluz

components/validator.rst

@@ -60,7 +60,7 @@ If you have lots of validation errors, you can filter them by error code::
     use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 
     $violations = $validator->validate(...);
-    if (count($violations->findByCodes(UniqueEntity::NOT_UNIQUE_ERROR))) {
+    if (0 !== count($violations->findByCodes(UniqueEntity::NOT_UNIQUE_ERROR))) {
         // handle this specific error (display some message, send an email, etc.)
     }