Merge branch '2.7' into 2.8

* 2.7:
  [Yaml] Fix tests on PHP 7.0.2
  [2.7] Workaround https://bugs.php.net/63206
  [2.3] Workaround https://bugs.php.net/63206
  Add closing parenthesis
  [Serializer] Unset object_to_populate after using it
  [Serializer] Allow to use proxies in object_to_populate

Author: nicolas-grekas

Tests/Fixtures/YtsSpecificationExamples.yml

@@ -515,7 +515,7 @@ yaml: |
 php: |
   array(
     'canonical' => 12345,
-    'decimal' => 12345,
+    'decimal' => 12345.0,
     'octal' => 014,
     'hexadecimal' => 0xC
   )
@@ -1538,7 +1538,7 @@ yaml: |
 php: |
    array(
      'canonical' => 12345,
-     'decimal' => 12345,
+     'decimal' => 12345.0,
      'octal' => 12,
      'hexadecimal' => 12
    )

Tests/Fixtures/YtsTypeTransfers.yml

@@ -182,8 +182,8 @@ php: |
     array(
       'zero' => 0,
       'simple' => 12,
-      'one-thousand' => 1000,
-      'negative one-thousand' => -1000
+      'one-thousand' => 1000.0,
+      'negative one-thousand' => -1000.0
     )
 ---
 test: Integers as Map Keys