[libvirt] PATCH: Fix escaping for 8-bit high characters

[Daniel P. Berrange]

The virBufferEscapeString method has a broken test

  *cur > 0x20

which causes all 8-bit high characters to be lost as 'cur' is a signed
char. This obviously dooms anyone using UTF-8 characters outside the
boring old ASCII-7 range, like this guy

  https://bugzilla.redhat.com/show_bug.cgi?id=479517

Daniel

diff --git a/src/buf.c b/src/buf.c
index 259175d..c802aa2 100644
--- a/src/buf.c
+++ b/src/buf.c
@@ -304,7 +304,7 @@ virBufferEscapeString(const virBufferPtr buf, const char *format, const char *st
             *out++ = 'o';
             *out++ = 's';
             *out++ = ';';
-        } else if ((*cur >= 0x20) || (*cur == '\n') || (*cur == '\t') ||
+        } else if (((unsigned char)*cur >= 0x20) || (*cur == '\n') || (*cur == '\t') ||
                    (*cur == '\r')) {
             /*
              * default case, just copy !


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