More prototype warning stuff.

I know these should be in the .h files,
but we can cover that later.

src/NoteField.cpp

@@ -20,6 +20,9 @@
 #include "Course.h"
 #include "NoteData.h"
 
+float FindFirstDisplayedBeat( const PlayerState* pPlayerState, int iDrawDistanceAfterTargetsPixels );
+float FindLastDisplayedBeat( const PlayerState* pPlayerState, int iDrawDistanceBeforeTargetsPixels );
+
 static ThemeMetric<bool> SHOW_BOARD( "NoteField", "ShowBoard" );
 static ThemeMetric<bool> SHOW_BEAT_BARS( "NoteField", "ShowBeatBars" );
 static ThemeMetric<float> FADE_BEFORE_TARGETS_PERCENT( "NoteField", "FadeBeforeTargetsPercent" );