Remove redundant isset && !== null

src/CodeCoverage/Report/Clover.php

@@ -78,7 +78,7 @@ public function process(PHP_CodeCoverage $coverage, $target = null, $name = null
                     for ($i  = $method['startLine'];
                          $i <= $method['endLine'];
                          $i++) {
-                        if (isset($coverage['lines'][$i]) && ($coverage['lines'][$i] !== null)) {
+                        if (isset($coverage['lines'][$i])) {
                             $methodCount = max($methodCount, count($coverage['lines'][$i]));
                         }
                     }