Previously, theme metric lookups follows Fallback at every place; for

example, if a base theme had:

[Derived]
Fallback=Base1

[Base1]
A=1

and a derived theme had:

[Derived]
Fallback=Base2

[Base2]

then the lookup "Derived", "A" would find 1.  This is confusing and inconsistent:
it means that the value of Derived::Fallback has two values, both Base1 and Base2,
and Base1 is only accessible by the internal metric lookup.  Every metric should
have only one value; "Fallback=Base1" should be completely overridden here.

(This also reduces the difference between theme lookups and path lookups; path
lookups did not have this anomaly, as they did not have access to the extra Fallback
value.)

stepmania/src/ThemeManager.cpp

@@ -584,17 +584,17 @@ bool ThemeManager::GetMetricRawRecursive( const CString &sClassName, const CStri
 	if( level > 100 )
 		RageException::Throw("Infinite recursion looking up theme metric \"%s::%s\"", sClassName.c_str(), sValueName.c_str() );
 
-	CString sFallback;
-
 	FOREACHD_CONST( Theme, g_vThemes, iter )
 	{
 		if( iter->iniMetrics->GetValue(sClassName,sValueName,ret) )
 			return true;
+	}
+
+	FOREACHD_CONST( Theme, g_vThemes, iter )
+	{
+		CString sFallback;
 		if( iter->iniMetrics->GetValue(sClassName,"Fallback",sFallback) )
-		{
-			if( GetMetricRawRecursive(sFallback,sValueName,ret,level+1) )
-				return true;
-		}
+			return GetMetricRawRecursive(sFallback,sValueName,ret,level+1);
 	}
 
 	return false;