Merge branch '104-status_format_rawdata_always_true' into '_compatible_ppd'

Resolve "[BUG] in client context the status of format_rawdata is alway True event when failed"

See merge request !72

mpl_client.py

@@ -332,7 +332,7 @@ class MplClient():
                 # Print error message
                 print(str(formated_data.content))
                 
-            datas = (None,)
+            datas = None
         else:
             # set the figure data to answerSig.value
             datas = formated_data.content

mpl_fig.py

@@ -882,13 +882,15 @@ class MplFig(metaclass=FigureClassFactory, context=CONTEXT.lower()):
         synchronized figure (server-side) """
         if (self.client is not None) and (self.sync_id != -1):
 
-            if (True):
-                datas = self.client.sync_fig_format_rawdata(self.sync_id)
+            datas = self.client.sync_fig_format_rawdata(self.sync_id)
 
-            for ax, data in zip(self.get_axes(), datas):
-                ax.data = data
+            if datas is not None:
+                for ax, data in zip(self.get_axes(), datas):
+                    ax.data = data
 
-            self.formatted = True
+                self.formatted = True
+            else:
+                return(False)
 
         else:
             print(SEVR + 'The figure is not properly synchronized.')