Fix fire placement by blocks when fire-spread is set to deny

Fixes #2070

Author: aurorasmiles

worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/listener/RegionProtectionListener.java

@@ -173,7 +173,7 @@ public void onPlaceBlock(final PlaceBlockEvent event) {
             /* Flint and steel, fire charge, etc. */
             if (Materials.isFire(type)) {
                 Block block = event.getCause().getFirstBlock();
-                boolean fire = block != null && Materials.isFire(type);
+                boolean fire = block != null && Materials.isFire(block.getType());
                 boolean lava = block != null && Materials.isLava(block.getType());
                 List<StateFlag> flags = new ArrayList<>();
                 flags.add(Flags.BLOCK_PLACE);