[libxslt] Small fixes to locale code

[Daniel Veillard <veillard src gnome org>]

commit 2c2872e2481d8aac5f1d591f5f0a6150204ad93f
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Nov 8 11:09:25 2010 +0100

    Small fixes to locale code

 libxslt/xsltlocale.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/libxslt/xsltlocale.c b/libxslt/xsltlocale.c
index ec03cde..2caa2ec 100644
--- a/libxslt/xsltlocale.c
+++ b/libxslt/xsltlocale.c
@@ -26,9 +26,9 @@
 #define LC_COLLATE_MASK (1 << LC_COLLATE)
 #endif
 
-#define ISALPHA(c) ((c & 0xc0) == 0x40 && (unsigned)((c & 0x1f) - 1) < 26)
 #define TOUPPER(c) (c & ~0x20)
 #define TOLOWER(c) (c | 0x20)
+#define ISALPHA(c) ((unsigned)(TOUPPER(c) - 'A') < 26)
 
 /*without terminating null character*/
 #define XSLTMAX_ISO639LANGLEN		8
@@ -97,11 +97,11 @@ xsltNewLocale(const xmlChar *languageTag) {
     	return(NULL);
     
     llen = i;
-    *q++ = '_';
     
     if (*p) {
     	if (*p++ != '-')
     	    return(NULL);
+        *q++ = '_';
 	
 	for (i=0; i<XSLTMAX_ISO3166CNTRYLEN && ISALPHA(*p); ++i)
 	    *q++ = TOUPPER(*p++);
@@ -116,7 +116,7 @@ xsltNewLocale(const xmlChar *languageTag) {
         
         /* Continue without using country code */
         
-        q = localeName + llen + 1;
+        q = localeName + llen;
     }
     
     /* Try locale without territory, e.g. for Esperanto (eo) */
@@ -135,7 +135,8 @@ xsltNewLocale(const xmlChar *languageTag) {
     if (region == NULL)
         return(NULL);
      
-    q = localeName + llen + 1;
+    q = localeName + llen;
+    *q++ = '_';
     *q++ = region[0];
     *q++ = region[1];
     memcpy(q, ".utf8", 6);