Fix bug in atof test. Thx @cerf for reporting.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5087 dfc29bdd-3216-0410-991c-e03cc46cb475

tests/fast_atof.cpp

@@ -91,7 +91,7 @@ static bool testCalculation_atof(const char * valueString)
 		valueString, newFastValue, oldFastValue, atofValue);
 
 	const f32 diffNew = fabs(newFastValue - atofValue) ;
-	const f32 diffOld = fabs(newFastValue - atofValue) ;
+	const f32 diffOld = fabs(oldFastValue - atofValue) ;
 	bool accurate = diffNew <= diffOld || equalsByUlp(diffNew, diffOld, 1);
 
 	if(!accurate)