Add muddy mangrove roots

overviewer_core/src/mc_id.h

@@ -411,6 +411,7 @@ enum mc_block_id {
     block_mud_brick_slab = 1124,
     block_mangrove_roots = 1125,
     block_mangrove_log = 1126,
+    block_muddy_mangrove_roots = 1127,
 
     // adding a gap in the numbering of walls to keep them all
     // in one numbering block starting at 1792

overviewer_core/src/overviewer.h

@@ -31,7 +31,7 @@
 
 // increment this value if you've made a change to the c extension
 // and want to force users to rebuild
-#define OVERVIEWER_EXTENSION_VERSION 112
+#define OVERVIEWER_EXTENSION_VERSION 113
 
 #include <stdbool.h>
 #include <stdint.h>