fix minY reference in findBlock

lib/plugins/blocks.js

@@ -209,7 +209,7 @@ function inject (bot, { version, storageBuilder }) {
       if (next.y >= 0 && next.y < 16 && column && !visitedSections.has(next.toString())) {
         const section = column.sections[next.y]
         if (useExtraInfo === true || isBlockInSection(section, matcher)) {
-          const cursor = new Vec3(next.x * 16, next.y * 16 + bot.game.dimensionData.min_y, next.z * 16)
+          const cursor = new Vec3(next.x * 16, next.y * 16 + bot.game.minY, next.z * 16)
           const end = cursor.offset(16, 16, 16)
           for (; cursor.x < end.x; cursor.x++) {
             for (; cursor.y < end.y; cursor.y++) {