fix except parse json

File
"/usr/lib/enigma2/python/Plugins/Extensions/IPtvDream/api/playlist.py",
line 56, in setChannelsList
    self._downloadTvgMap()
  File
"/usr/lib/enigma2/python/Plugins/Extensions/IPtvDream/api/m3u.py", line
96, in _downloadTvgMap
    self.tvg_map =
json_loads(self.readHttp(self.site + "/channels"))['data']
  File
"/usr/lib/python3.9/json/__init__.py", line 346, in loads
  File
"/usr/lib/python3.9/json/decoder.py", line 337, in decode
  File
"/usr/lib/python3.9/json/decoder.py", line 355, in
raw_decode
json.decoder.JSONDecodeError: Expecting value: line 1 column
1 (char 0)

src/api/m3u.py

@@ -97,10 +97,9 @@ def _downloadTvgMap(self):
 			except IOError as e:
 				self.trace("error!", e)
 				self.tvg_map = {}
-				#if not "technic.cf" in self.site:
-				#	raise APIException(e)
-				#else:
-				#	self.tvg_map = {}
+			except Exception as e:
+				self.trace("Failed to parse json: %s" % str(e))
+				self.tvg_map = {}
 
 	def makeChannel(self, num, name, url, tvg, logo, rec):
 		"""