revert source map line offset

yyx990803 · yyx990803 · commit 863a1c171813 · 2018-01-31T00:25:19.000-05:00
diff --git a/lib/parser.js b/lib/parser.js
@@ -45,7 +45,7 @@ function generateSourceMap (filename, source, generated, sourceRoot) {
       map.addMapping({
         source: filename,
         original: {
-          line: index,
+          line: index + 1,
           column: 0
         },
         generated: {
