Fix #985 - strip null from object type where possible

src/Psalm/Type/Reconciler.php

@@ -448,6 +448,7 @@ class Reconciler
 
             foreach ($existing_var_atomic_types as $type_key => $type) {
                 if ($type instanceof TNamedObject
+                    || $type instanceof TObject
                     || $type instanceof TResource
                     || $type instanceof TCallable
                 ) {

tests/TypeReconciliationTest.php

@@ -1019,6 +1019,16 @@ class TypeReconciliationTest extends TestCase
                         echo substr($_SERVER["abc"], 1, 2);
                     }',
             ],
+            'notObject' => [
+                '<?php
+                  function f(): ?object {
+                        return rand(0,1) ? new stdClass : null;
+                  }
+
+                  $data = f();
+                  if (!$data) {}
+                  if ($data) {}',
+            ],
         ];
     }