[#22782] Solidify Thickness negative and positive values are the same result

more a communication problem but Ed Britton raises a valid point that often you want the original faces so changing the default offset to -1.0.

source/blender/modifiers/intern/MOD_solidify.c

@@ -162,6 +162,7 @@ static void initData(ModifierData *md)
 {
 	SolidifyModifierData *smd = (SolidifyModifierData*) md;
 	smd->offset = 0.01f;
+	smd->offset_fac = -1.0f;
 	smd->flag = MOD_SOLIDIFY_RIM;
 }