Add None check for conditional

Author: myxie

graphs/chilies_split_config.graph

@@ -297,7 +297,7 @@
             "outputAppFields": [],
             "inputApplicationName": "GenericScatterApp",
             "inputApplicationType": "DALiuGEApp",
-            "inputApplicationId": "1703c2ac-9540-4300-a55a-35512f290d70",
+            "inputApplicationId": "f8a3e4c2-7f2b-405f-8791-94af06d7aca2",
             "inputApplicationDescription": "",
             "inputApplicationComment": "",
             "outputApplicationName": "",
@@ -2174,7 +2174,7 @@
             "description": "In-memory storage of intermediate data products",
             "comment": "",
             "x": 1653.6284798815782,
-            "y": -625.4572273813305,
+            "y": -627.4360705208536,
             "repositoryUrl": "https://github.com/ICRAR/daliuge",
             "commitHash": "117d50e",
             "paletteDownloadUrl": "https://raw.githubusercontent.com/ICRAR/EAGLE-graph-repo/master/daliuge/daliuge-master.palette",
@@ -3189,7 +3189,7 @@
                 },
                 {
                     "name": "func_code",
-                    "value": "def conditionB(x): \n    return (len(x) > 0)",
+                    "value": "def conditionB(x): \n    if x == None:\n        return False\n    return (len(x) > 0)",
                     "defaultValue": "def condition(x): return (x > 0)",
                     "description": "Python function code for the branch condition. Modify as required. Note that func_name above needs to match the defined name here.",
                     "readonly": false,