Instead of manually pausing and unpausing, automatically pause the

memory card thread when mounting the first drive, and automatically
unpause it when we unmount the last drive.  (We can do this simplification
because we always mount and unmount memory cards explicitly when
reading and writing to them.)

stepmania/src/GameState.cpp

@@ -230,8 +230,9 @@ void GameState::PlayersFinalized()
 
 	m_bPlayersFinalized = true;
 
-	MEMCARDMAN->PauseMountingThread();
 	MEMCARDMAN->LockCards();
+
+	/* Mount all available cards, for loading the profile and edits. */
 	MEMCARDMAN->TryMountAllCards();
 
 	// apply saved default modifiers if any
@@ -276,7 +277,6 @@ void GameState::PlayersFinalized()
 	}
 
 	MEMCARDMAN->UnmountAllUsedCards();
-	MEMCARDMAN->UnPauseMountingThread();
 }
 
 /* This data is added to each player profile, and to the machine profile per-player. */
@@ -350,7 +350,6 @@ void GameState::EndGame()
 		}
 	}
 
-	MEMCARDMAN->PauseMountingThread();
 	MEMCARDMAN->MountAllUsedCards();
 
 	BOOKKEEPER->WriteToDisk();
@@ -371,8 +370,6 @@ void GameState::EndGame()
 	MEMCARDMAN->FlushAndReset();
 	CHECKPOINT;
 
-	MEMCARDMAN->UnPauseMountingThread();
-
 	SONGMAN->FreeAllLoadedFromProfiles();
 
 	// make sure we don't execute EndGame twice.