fixed: Poll question/answers with international text corrupted

docs/changelog/7.x.x.txt

@@ -2,6 +2,7 @@
  - fixed: Collaboration System attachments follow site's max size instead of CS's
  - fixed: Rich editor image uploader doesn't follow size limits
  - make sure all tables are using UTF-8
+ - fixed: Poll question/answers with international text corrupted
 
 7.5.8
  - moved Gallery utility methods to WebGUI::Utility::Gallery

lib/WebGUI/Asset/Wobject/Poll.pm

@@ -192,7 +192,7 @@ sub freezeGraphConfig {
     my $self        = shift;
     my $obj         = shift;
     
-    return JSON::to_json($obj);
+    return JSON::encode_json($obj);
 }
 
 
@@ -404,7 +404,7 @@ sub thawGraphConfig {
     my $string      = shift;
     
     return unless $string;
-    return JSON::from_json($string);
+    return JSON::decode_json($string);
 }
 
 #-------------------------------------------------------------------