From 7f9a313b94e7180a6ce16bcca98acca390eb7d70 Mon Sep 17 00:00:00 2001
From: PKEuS <philipp.kloke@web.de>
Date: Sun, 26 Jul 2015 14:19:02 +0200
Subject: [PATCH] Fixed hang in VS10 debug mode (AppVeyor)

---
 lib/preprocessor.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/preprocessor.cpp b/lib/preprocessor.cpp
index f6d26cd7e..a96d87f6d 100644
--- a/lib/preprocessor.cpp
+++ b/lib/preprocessor.cpp
@@ -2945,6 +2945,9 @@ std::string Preprocessor::expandMacros(const std::string &code, std::string file
     std::istringstream istr(code);
     std::string line;
     while (getlines(istr, line)) {
+        if (line.empty())
+            continue;
+
         // Preprocessor directive
         if (line[0] == '#') {
             // defining a macro..