Added std::nothrow

include/ArduinoJson/DynamicJsonBuffer.hpp

@@ -53,7 +53,10 @@ class DynamicJsonBuffer : public JsonBuffer {
   }
 
   void* allocInOtherBlocks(size_t bytes) {
-    if (!_next) _next = new DynamicJsonBuffer();
+    if (!_next) {
+      _next = new (std::nothrow) DynamicJsonBuffer();
+      if (!_next) return NULL;
+    }
     return _next->alloc(bytes);
   }