fix RandomGen off by 1. Was retruning.[0,max), not [0,max]. (Caused random courseEntries to never pick the last song in the list)

stepmania/src/RageUtil.cpp

@@ -48,7 +48,10 @@ RandomGen::RandomGen( unsigned long seed_ )
 
 int RandomGen::operator() ( int maximum )
 {
-	return int(RandomFloat( seed ) * maximum);
+	float f = RandomFloat(seed) * (maximum+1);
+	int ans = int(f);
+	CLAMP( ans, 0, maximum );
+	return ans;
 }
 
 

stepmania/src/RageUtil.h

@@ -160,7 +160,7 @@ inline uint16_t Swap16LE( uint16_t n ) { return Swap16( n ); }
 
 extern int randseed;
 
-float RandomFloat( int &seed );
+float RandomFloat( int &seed );	// between 0.0f and 1.0f
 
 inline float RandomFloat()
 {