Minor fix to extendMatch

src/datastructures/SuffixTrie.java

@@ -106,8 +106,9 @@ public class SuffixTrie extends HashTrieMap<Byte, ByteString, Boolean> {
         // Note: this method has been provided for you. You should not make any
         // changes to this method.
         int numMatches = 0;
-        while (buffer.hasWork() && !this.currentMatch.isFull() &&
-                this.currentMatch.peek(numMatches) == buffer.peek()) {
+        while (buffer.hasWork() && 
+               this.currentMatch.size() <= this.currentMatch.capacity() - 1 && 
+               this.currentMatch.peek(numMatches) == buffer.peek()) {
             this.currentMatch.add(buffer.next());
             numMatches += 1;
         }