Short message on PDF if there are no applications (#249)

openslides/application/views.py

@@ -700,6 +700,9 @@ class ApplicationPDF(PDFView):
             if preamble:
                 story.append(Paragraph("%s" % preamble.replace('\r\n','<br/>'), stylesheet['Paragraph']))
             story.append(Spacer(0,0.75*cm))
+            if not Application.objects.exists(): # No applications existing
+                story.append(Paragraph(_("No applications existing."), stylesheet['Heading3']))
+            else: # Print all Applications
                 # List of applications
                 for application in Application.objects.order_by('number'):
                     if application.number: