Imports not correctly compiling

[zerovox]

For files a.less:

@import b.less;
.bar {
  .foo;
  font-size: 15px;
}

and b.less:

.foo {
  background: green;
}

lesscss-engine compiles a.less to the following css:

.bar {
  background: green;
  font-size: 15px;
}

rather than:

.foo {
  background: green;
}
.bar {
  background: green;
  font-size: 15px;
}

This is a regression and was not the case in 1.3.3.