validate-jsdoc: fix dirty line modification ;-(

Fixes #89

Author: Alexej Yaroshevich

lib/rules/validate-jsdoc.js

@@ -130,7 +130,7 @@ module.exports.prototype = {
                         return;
                     }
                     // call tag validator
-                    commentStart.line = commentStartLine + i;
+                    commentStart._line = commentStartLine + i;
                     validators['@' + tag.id].forEach(function(v) {
                         v.call(_this, node, tag, fixErrLocation(addError, tag));
                     });
@@ -149,7 +149,7 @@ module.exports.prototype = {
                         line = relLine.line;
                         column = relLine.column;
                     } else {
-                        line = commentStart.line + (relLine || 0);
+                        line = commentStart._line + (relLine || 0);
                         column = commentStart.column + (relColumn || 0);
                     }
                     errors.add(text, line, column);