[librsvg] rsvg-load: include string.h

[Paolo Borelli <pborelli src gnome org>]

commit 8a6cc7dad3da2171da99aeb6a3bcb68170adc051
Author: Paolo Borelli <pborelli gnome org>
Date:   Tue Apr 3 10:11:57 2018 +0200

    rsvg-load: include string.h
    
    The CI build started complain about it, not sure why it did not
    see it before. Anyway we are using memcmp etc so we need to include
    this file.

 librsvg/rsvg-load.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/librsvg/rsvg-load.c b/librsvg/rsvg-load.c
index 011c5ca2..aca597bc 100644
--- a/librsvg/rsvg-load.c
+++ b/librsvg/rsvg-load.c
@@ -24,6 +24,7 @@
 #include <libxml/uri.h>
 #include <libxml/parser.h>
 #include <libxml/parserInternals.h>
+#include <string.h>
 
 #include "rsvg-attributes.h"
 #include "rsvg-filter.h"