Prevent the generateGraph yesNo from being generated twice in the editForm.

Fixes bug #10829.

docs/changelog/7.x.x.txt

@@ -1,4 +1,5 @@
 7.7.19
+ - fixed #10829: Extra field in Poll Property tab
  - refactored out JSON collateral module, to use with any module in WebGUI.
  - fixed #10825: Text and MediumText fields should be LongText
  - fixed #10808: Ask user about using rich edit option causes error in IE6

lib/WebGUI/Asset/Wobject/Poll.pm

@@ -177,13 +177,14 @@ sub definition {
 				fieldType=>"hidden",
 				defaultValue=>undef,
 				},
-			generateGraph=>{
-				fieldType=>"yesNo",
-				defaultValue=>0,
-				},
-			}
-		});
-        return $class->SUPER::definition($session, $definition);
+            generateGraph => {
+                fieldType    => "yesNo",
+                defaultValue => 0,
+                autoGenerate => 0,
+            },
+        }
+    });
+    return $class->SUPER::definition($session, $definition);
 }
 
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