Fixed compile warnings.

Author: javadev

src/main/kotlin/g0201_0300/s0212_word_search_ii/Solution.kt

@@ -3,6 +3,7 @@ package g0201_0300.s0212_word_search_ii
 // #Hard #Top_Interview_Questions #Array #String #Matrix #Backtracking #Trie
 // #2022_10_24_Time_268_ms_(100.00%)_Space_37.5_MB_(95.08%)
 
+@Suppress("NAME_SHADOWING")
 class Solution {
     private var root: Tree? = null
     fun findWords(board: Array<CharArray>, words: Array<String?>): List<String> {
@@ -36,7 +37,7 @@ class Solution {
             val s: String = cur.end!!
             collected.add(s)
             cur.end = null
-            if (cur.len() === 0) {
+            if (cur.len() == 0) {
                 Tree.deleteWord(root, s)
             }
         }

src/main/kotlin/g0201_0300/s0212_word_search_ii/Tree.kt

@@ -1,5 +1,6 @@
 package g0201_0300.s0212_word_search_ii
 
+@Suppress("NAME_SHADOWING")
 class Tree {
     private var children: Array<Tree?>? = null
     var end: String? = null