PEAR/MultiLineAssignment: fix incorrect parameter passed to findPrevious()

Author: jrfnl

src/Standards/PEAR/Sniffs/Formatting/MultiLineAssignmentSniff.php

@@ -62,7 +62,7 @@ public function process(File $phpcsFile, $stackPtr)
         }
 
         // Make sure it is the first thing on the line, otherwise we ignore it.
-        $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), false, true);
+        $prev = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
         if ($prev === false) {
             // Bad assignment.
             return;