xmllite: Fix reader_cmp for multiple characters.

[Vincent Povirk]

reader_get_ptr reads at least one character ahead, but reader_cmp can
be given a string with multiple characters. If we didn't read enough
characters, reader_cmp will report a non-match when it shouldn't. So
make sure we read far enough ahead to compare the string.
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From c5e1e7624875ff935954a2a2ee21b70216bd2ab9 Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent at codeweavers.com>
Date: Fri, 20 Feb 2015 12:54:32 -0600
Subject: [PATCH] xmllite: Fix reader_cmp for multiple characters.

---
 dlls/xmllite/reader.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/dlls/xmllite/reader.c b/dlls/xmllite/reader.c
index cf89fb7..2aa9d95 100644
--- a/dlls/xmllite/reader.c
+++ b/dlls/xmllite/reader.c
@@ -900,8 +900,20 @@ static inline WCHAR *reader_get_ptr(xmlreader *reader)
 
 static int reader_cmp(xmlreader *reader, const WCHAR *str)
 {
+    int i=0;
     const WCHAR *ptr = reader_get_ptr(reader);
-    return strncmpW(str, ptr, strlenW(str));
+    while (str[i])
+    {
+        if (!ptr[i])
+        {
+            reader_more(reader);
+            ptr = reader_get_ptr(reader);
+        }
+        if (str[i] != ptr[i])
+            return ptr[i] - str[i];
+        i++;
+    }
+    return 0;
 }
 
 /* moves cursor n WCHARs forward */
-- 
2.1.0