better ignore rules that fail

Author: MadeByMike

index.js

@@ -119,8 +119,10 @@ module.exports = function(css, options){
     whitespace();
     comments(rules);
     while (css.length && css.charAt(0) != '}' && (node = atrule() || rule())) {
-      rules.push(node);
-      comments(rules);
+      if(node !== false){
+        rules.push(node);
+        comments(rules);
+      }
     }
     return rules;
   }
@@ -248,8 +250,10 @@ module.exports = function(css, options){
     // declarations
     var decl;
     while (decl = declaration()) {
-      decls.push(decl);
-      comments(decls);
+      if(decl !== false){
+        decls.push(decl);
+        comments(decls);
+	  }
     }
 
     if (!close()) return error("missing '}'");