erp5_document_scanner: Check properly if there is an image to store in Active Process

erp5_document_scanner/SkinTemplateItem/portal_skins/erp5_document_scanner/Base_redirectToUploadDocumentFromCameraStep2Dialog.py

+return context.Base_renderForm('Base_viewUploadDocumentFromCameraStep2Dialog',
+                               message='Please fill the information')

erp5_document_scanner/SkinTemplateItem/portal_skins/erp5_document_scanner/Base_redirectToUploadDocumentFromCameraStep2Dialog.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>Script_magic</string> </key>
+            <value> <int>3</int> </value>
+        </item>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                </klass>
+                <tuple/>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_container</string> </key>
+                                <value> <string>container</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_context</string> </key>
+                                <value> <string>context</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_m_self</string> </key>
+                                <value> <string>script</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>_params</string> </key>
+            <value> <string>**kw</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>Base_redirectToUploadDocumentFromCameraStep2Dialog</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

erp5_document_scanner/SkinTemplateItem/portal_skins/erp5_document_scanner/Base_storeDocumentFromCameraInActiveProcess.py

@@ -14,7 +14,7 @@ if not active_preference:
 if active_preference and preferred_cropped_canvas_data:
   active_preference.setPreferredCroppedCanvasData(preferred_cropped_canvas_data)
 
-if not document_scanner_gadget:
+if not image_str:
   return context.Base_renderForm('Base_viewUploadDocumentFromCameraStep1Dialog',
                                message='Nothing to capture')