fix issue when no synopsys div

backend/chainetv/emission.py

@@ -24,14 +24,22 @@ def parse_emmission(strsearch):
     html = response.read()
     parse=BeautifulSoup(html,"html.parser")
     divcasting=parse.select_one(".descriptif")
+    if (divcasting):
         casting=divcasting.find_all(href=re.compile("biographie"))
         count=0
         for actor in casting:
             casting[count]=actor.text
             count+=1
+    else:
+        casting= None
     divsynopsis=parse.select_one(".episode-synopsis")
+    if (divsynopsis):
         img=divsynopsis.find_next('img')['data-src']
         synopsis=divsynopsis.select_one(".d-b").text
+    else:
+        img=None
+        synopsis=""
+        
     return {'title':link['title'],'href':href,'casting':casting,'synopsis':remove_first_space(synopsis),'img':img}