[libxml2] Fix Windows compiler warnings in xmlCanonicPath

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 41c0a13fe7455bbdd3aa785a67ded91058f81333
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Oct 9 13:32:20 2017 +0200

    Fix Windows compiler warnings in xmlCanonicPath
    
    The code handling Windows paths assigned some char/xmlChar pointers
    without explicit casts. Also remove an unused variable.

 uri.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/uri.c b/uri.c
index 62bedd1..84e420a 100644
--- a/uri.c
+++ b/uri.c
@@ -2394,8 +2394,7 @@ xmlCanonicPath(const xmlChar *path)
  */
 #if defined(_WIN32) && !defined(__CYGWIN__)
     int len = 0;
-    int i = 0;
-    xmlChar *p = NULL;
+    char *p = NULL;
 #endif
     xmlURIPtr uri;
     xmlChar *ret;
@@ -2477,7 +2476,7 @@ path_processing:
     len = xmlStrlen(path);
     if ((len > 2) && IS_WINDOWS_PATH(path)) {
         /* make the scheme 'file' */
-       uri->scheme = xmlStrdup(BAD_CAST "file");
+       uri->scheme = (char *) xmlStrdup(BAD_CAST "file");
        /* allocate space for leading '/' + path + string terminator */
        uri->path = xmlMallocAtomic(len + 2);
        if (uri->path == NULL) {
@@ -2487,9 +2486,9 @@ path_processing:
        /* Put in leading '/' plus path */
        uri->path[0] = '/';
        p = uri->path + 1;
-       strncpy(p, path, len + 1);
+       strncpy(p, (char *) path, len + 1);
     } else {
-       uri->path = xmlStrdup(path);
+       uri->path = (char *) xmlStrdup(path);
        if (uri->path == NULL) {
            xmlFreeURI(uri);
            return(NULL);