Try alternative way to find disc id if system.cnf is missing

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

gamedb.py

@@ -49322,6 +49322,9 @@
         'url': "games/J/N/SLPS-00006.html",
     	'id': 'SLPS00006',
 	'title': "NEKKETSU OYAKO",
+        'pic0': 'https://images.launchbox-app.com/822f44c5-9aa8-4182-8a30-48dfd566cc7f.png',
+        'pic1': 'https://images.launchbox-app.com/6c57475d-0c36-4462-879c-4a0060035eb7.png',
+        'snd0': 'https://www.youtube.com/watch?v=kvhuLRyVN4w',
     },
     'SLPS01616': {
         'url': "games/J/N/SLPS-01616.html",

pop-fe.py

@@ -106,12 +106,9 @@ def get_gameid_from_iso(path='NORMAL01.iso'):
     except:
         print('Failed to read game id. Falling back to raw read')
         with open(path, 'rb') as f:
-            buf = f.read(10*1024*1024)
-            idx = buf.find('cdrom:'.encode())
-            if (idx > 0):
-                buf = str(buf[idx:idx+1024])
-            else:
-                return 'UNKN00000'
+            f.seek(0x8028)
+            buf = str(f.read(9))[2:-1]
+            return buf
 
     idx = buf.find('cdrom:')
     if idx < 0: