Vertical align on empty label

Please check this: http://www.codeply.com/go/nLQVaMkRGE

Author: zalog

awesome-bootstrap-checkbox.less

@@ -22,6 +22,7 @@
 
   label{
     display: inline-block;
+    vertical-align: middle;
     position: relative;
     padding-left: 5px;
 
@@ -124,6 +125,7 @@
 
   label{
     display: inline-block;
+    vertical-align: middle;
     position: relative;
     padding-left: 5px;
 
@@ -194,4 +196,4 @@
 .radio-variant(radio-danger, @brand-danger);
 .radio-variant(radio-info, @brand-info);
 .radio-variant(radio-warning, @brand-warning);
-.radio-variant(radio-success, @brand-success);
+.radio-variant(radio-success, @brand-success);