[libxml2] win32\VC10\config.h and VS 2015

[Daniel Veillard <veillard src gnome org>]

commit dfbacd4f417cb0f4b9bef3ff205bf95cb73c5717
Author: Bruce Dawson <brucedawson google com>
Date:   Mon Mar 7 13:46:28 2016 -0800

    win32\VC10\config.h and VS 2015
    
    --047d7bacb4ee71848a052d7c673a
    Content-Type: text/plain; charset=UTF-8
    
    The config.h file in win32\VC10 is incompatible with VS 2015 because VS
    2015 provides an implementation of snprintf and prohibits using the
    preprocessor to define it. Therefor an ifdef check is needed around that
    definition in VC10\config.h. Here is a patch that is compatible with the
    change that we made to Chromium's copy:

 win32/VC10/config.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/win32/VC10/config.h b/win32/VC10/config.h
index 8629944..891b57e 100644
--- a/win32/VC10/config.h
+++ b/win32/VC10/config.h
@@ -96,7 +96,9 @@ static int isnan (double d) {
 
 #if defined(_MSC_VER)
 #define mkdir(p,m) _mkdir(p)
+#if _MSC_VER < 1900 // Cannot define this in VS 2015 and above!
 #define snprintf _snprintf
+#endif
 #if _MSC_VER < 1500
 #define vsnprintf(b,c,f,a) _vsnprintf(b,c,f,a)
 #endif