libxslt: backport patch for CVE-2019-11068

Refreshed existing patches.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

libs/libxslt/patches/0020-Fix-heap-overread-in-xsltFormatNumberConversion.patch

@@ -12,11 +12,9 @@ Found with afl-fuzz and ASan.
  libxslt/numbers.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)
 
-diff --git a/libxslt/numbers.c b/libxslt/numbers.c
-index d1549b4..e78c46b 100644
 --- a/libxslt/numbers.c
 +++ b/libxslt/numbers.c
-@@ -1090,7 +1090,8 @@ xsltFormatNumberConversion(xsltDecimalFormatPtr self,
+@@ -1109,7 +1109,8 @@ xsltFormatNumberConversion(xsltDecimalFo
      }
  
      /* We have finished the integer part, now work on fraction */
@@ -26,6 +24,3 @@ index d1549b4..e78c46b 100644
          format_info.add_decimal = TRUE;
  	the_format += xsltUTF8Size(the_format);	/* Skip over the decimal */
      }
--- 
-2.10.2
-