Make multi-line comments not count when checking whether --> is first on a line.

src/preparser-api.cc

Index: src/preparser-api.cc
diff --git a/src/preparser-api.cc b/src/preparser-api.cc
index a0d13edb0d07a874a50f482b5f32e75f793db581..1a7402f9a83acc989a121576fe0996c360dc04b5 100644
--- a/src/preparser-api.cc
+++ b/src/preparser-api.cc
@@ -169,6 +169,7 @@ class StandAloneJavaScriptScanner : public JavaScriptScanner {
     // Skip initial whitespace allowing HTML comment ends just like
     // after a newline and scan first token.
     has_line_terminator_before_next_ = true;
+    has_multiline_comment_before_next_ = false;
     SkipWhiteSpace();
     Scan();
   }