Use consistent thread names.

stepmania/src/RageThreads.cpp

@@ -252,7 +252,7 @@ static struct SetupMainThread
 	{
 		LockMut(g_ThreadSlotsLock);
 		int slot = FindEmptyThreadSlot();
-		strcpy( g_ThreadSlots[slot].name, "Main thread" );
+		strcpy( g_ThreadSlots[slot].name, "MainThread" );
 		sprintf( g_ThreadSlots[slot].ThreadFormattedOutput, "Thread: %s", g_ThreadSlots[slot].name );
 		g_ThreadSlots[slot].id = RageThread::GetCurrentThreadID();
 		g_ThreadSlots[slot].pImpl = MakeThisThread();

stepmania/src/arch/InputHandler/InputHandler_Carbon.cpp

@@ -833,7 +833,7 @@ InputHandler_Carbon::InputHandler_Carbon() : mMasterPort(0), mSem("Input thread
 		IOObjectRelease( iter );
 	}
 	
-	mInputThread.SetName( "Input thread." );
+	mInputThread.SetName( "InputThread" );
 	mInputThread.Create(InputHandler_Carbon::Run, this);
 	// Wait for the run loop to start before returning.
 	mSem.Wait();