skipping same type conversions

Author: Jeroen van Schagen

src/main/java/io/beanmapper/BeanMapperConverterAdapter.java

@@ -41,6 +41,10 @@ public Set<ConvertiblePair> getConvertibleTypes() {
      */
     @Override
     public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+        // Skip converting between the same types
+        if (sourceType.getType().equals(targetType.getType())) {
+            return source;
+        }
         return beanMapper.map(source, targetType.getType());
     }