fix problematic use of tolower() when calculating the version

hash by using locale independant tolower_ascii() function. 
Thanks to M. Vefa Bicakci (LP: #80248)

1 files changed, 2 insertions, 2 deletions

diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc
index 4fbf42c4b..6687864ee 100644
--- a/apt-pkg/pkgcache.cc
+++ b/apt-pkg/pkgcache.cc
@@ -163,7 +163,7 @@ unsigned long pkgCache::sHash(const string &Str) const
 {
    unsigned long Hash = 0;
    for (string::const_iterator I = Str.begin(); I != Str.end(); I++)
-      Hash = 5*Hash + tolower(*I);
+      Hash = 5*Hash + tolower_ascii(*I);
    return Hash % _count(HeaderP->HashTable);
 }
 
@@ -171,7 +171,7 @@ unsigned long pkgCache::sHash(const char *Str) const
 {
    unsigned long Hash = 0;
    for (const char *I = Str; *I != 0; I++)
-      Hash = 5*Hash + tolower(*I);
+      Hash = 5*Hash + tolower_ascii(*I);
    return Hash % _count(HeaderP->HashTable);
 }