fix: Negative hash again

Author: johanandren

config/src/main/java/com/typesafe/config/impl/BadMap.java

@@ -68,7 +68,7 @@ BadMap<K,V> copyingPut(K k, V v) {
     }
 
     private static <K,V> void store(Entry[] entries, int hash, K k, V v) {
-        int i = hash % entries.length;
+        int i = Math.abs(hash % entries.length);
         Entry old = entries[i];  // old may be null
         entries[i] = new Entry(hash, k, v, old);
     }

config/src/test/scala/com/typesafe/config/impl/BadMapTest.scala

@@ -98,6 +98,7 @@ class BadMapTest extends TestUtils {
         val negativeHashKey = new Key(Integer.MIN_VALUE)
         map = map.copyingPut(negativeHashKey, "value")
           .copyingPut(new Key(2), "other value")
+          .copyingPut(new Key(Integer.MIN_VALUE), "negative again")
           .copyingPut(new Key(3), "yet another value")
         assertEquals(map.get(negativeHashKey), "value")
     }