fix mcman detection of unformatted card insertion

Before this change, every time mcdetectcard was called from libmc over an unformatted card, the mcsync return value was -2

It should have been -2 if a new unformatted card was inserted since las call, and 0 if the same card remains plugged

Author: israpps

iop/memorycard/mcman/src/mcsio2.c

@@ -917,7 +917,10 @@ int mcman_probePS2Card(int port, int slot) //2
             SecrAuthDongle(2, slot, mcman_getcnum(port, slot));
         }
 #endif
-		if (r > 0)
+        HAKAMA_SIGNALSEMA();
+        if (r != 0)
+            return 0;
+		/*if (r > 0)
 		{
 			DPRINTF("mcman_probePS2Card sio2cmd succeeded\n");
             HAKAMA_SIGNALSEMA();
@@ -928,7 +931,7 @@ int mcman_probePS2Card(int port, int slot) //2
 			DPRINTF("mcman_probePS2Card sio2cmd failed (no format)\n");
             HAKAMA_SIGNALSEMA();
 			return sceMcResNoFormat;
-		}
+		}*/
 	}
 
 #if !defined(BUILDING_XFROMMAN) && !defined(BUILDING_VMCMAN)