Set default rounding mode to FE_NEAREST again. Thanks to Matthias Bentrup for providing some explanations.

code/sys/sys_unix.c

@@ -810,8 +810,8 @@ void Sys_GLimpInit( void )
 
 void Sys_SetFloatEnv(void)
 {
-	// rounding towards 0
-	fesetround(FE_TOWARDZERO);
+	// rounding toward nearest
+	fesetround(FE_TONEAREST);
 }
 
 /*