Update bug-10640.php

Author: staabm

tests/PHPStan/Analyser/nsrt/bug-10640.php

@@ -23,3 +23,9 @@
 		doAdd($changeSet['add']);
 	}
 }
+
+function doSomething($s) {}
+function toAdd($s) {}
+function toRem($s) {}
+function doDel($s) {}
+function doAdd($s) {}