Add missing release value call to %TypedArray%.prototype.findIndex routine (#2958)

This patch fixes #2947

Co-authored-by: Gabor Loki loki@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c

@@ -1550,7 +1550,13 @@ ecma_builtin_typedarray_prototype_find_helper (ecma_value_t this_arg, /**< this
 
     if (call_result)
     {
-      return is_find ? element_value : ecma_make_uint32_value (buffer_index);
+      if (is_find)
+      {
+        return element_value;
+      }
+
+      ecma_free_value (element_value);
+      return ecma_make_uint32_value (buffer_index);
     }
     buffer_index++;
     ecma_free_value (element_value);