fix logic flaw

BauSystem_15/src/de/steamwar/bausystem/utils/FlatteningWrapper15.java

@@ -173,7 +173,7 @@ public class FlatteningWrapper15 implements FlatteningWrapper {
                         } catch (WorldEditException ex) {
                             throw new RuntimeException(ex);
                         }
-                        if (blockName.startsWith("minecraft:tnt")) return false;
+                        if (blockName.startsWith("minecraft:tnt") && pasteOptions.isRemoveTNT()) return false;
                     }