EarlyExitSniff: fixed notice

Author: kukulich

SlevomatCodingStandard/Sniffs/ControlStructures/EarlyExitSniff.php

@@ -495,9 +495,11 @@ private function getAllConditionsPointers(\PHP_CodeSniffer\Files\File $phpcsFile
 			}
 
 			$currentConditionPointer = TokenHelper::findNextEffective($phpcsFile, $tokens[$conditionPointer]['scope_closer'] + 1);
-			while (in_array($tokens[$currentConditionPointer]['code'], [T_ELSEIF, T_ELSE], true)) {
-				$conditionsPointers[] = $currentConditionPointer;
-				$currentConditionPointer = TokenHelper::findNextEffective($phpcsFile, $tokens[$currentConditionPointer]['scope_closer'] + 1);
+			if ($currentConditionPointer !== null) {
+				while (in_array($tokens[$currentConditionPointer]['code'], [T_ELSEIF, T_ELSE], true)) {
+					$conditionsPointers[] = $currentConditionPointer;
+					$currentConditionPointer = TokenHelper::findNextEffective($phpcsFile, $tokens[$currentConditionPointer]['scope_closer'] + 1);
+				}
 			}
 		}
 

tests/Sniffs/ControlStructures/data/earlyExitNoErrors.php

@@ -173,3 +173,10 @@ function allConditionsWithEarlyExitButCodeAfter($dateTime) {
 
 	doSomething();
 }
+
+// Code in the end of file
+if (!empty($_SERVER['argv'])) {
+    something();
+} elseif (PHP_SAPI !== 'cli') {
+    somethingElse();
+}