Merge pull request #2029 from mgreter/bugfix/issue_1661

Preserve root flag on rulesets during all stages

Author: mgreter

src/cssize.cpp

@@ -97,6 +97,7 @@ namespace Sass {
                                   r->pstate(),
                                   r->selector(),
                                   r->block()->perform(this)->block());
+    rr->is_root(r->is_root());
     // rr->tabs(r->block()->tabs());
     p_stack.pop_back();
 

src/expand.cpp

@@ -147,6 +147,7 @@ namespace Sass {
       env_stack.pop_back();
       delete env;
     }
+    rr->is_root(r->is_root());
     rr->tabs(r->tabs());
 
     return rr;