src/dvbpsi.c: Do not check continuity counter when this PID has not been seen before

Do not check continuity counter when this PID has not been seen before.
This used to produce false positives.

src/dvbpsi.c

@@ -235,6 +235,11 @@ void dvbpsi_PushPacket(dvbpsi_t *handle, uint8_t* p_data)
     }
 
     /* Continuity check */
+    bool b_first = (p_decoder->i_continuity_counter == 0xFF);
+    if (b_first)
+        p_decoder->i_continuity_counter = p_data[3] & 0xf;
+    else
+    {
         i_expected_counter = (p_decoder->i_continuity_counter + 1) & 0xf;
         p_decoder->i_continuity_counter = p_data[3] & 0xf;
 
@@ -261,6 +266,7 @@ void dvbpsi_PushPacket(dvbpsi_t *handle, uint8_t* p_data)
                 p_decoder->p_current_section = NULL;
             }
         }
+    }
 
     /* Return if no payload in the TS packet */
     if (!(p_data[3] & 0x10))