[libxslt] Fix clang -Wconditional-uninitialized warning in libxslt/numbers.c

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 291d190b3d37bfe58efe7328e37a5334c553126b
Author: David Kilzer <ddkilzer apple com>
Date:   Tue Jan 7 15:15:53 2020 -0800

    Fix clang -Wconditional-uninitialized warning in libxslt/numbers.c
    
    * libxslt/numbers.c:
    (xsltFormatNumberConversion): Initialize `len` to fix warning.

 libxslt/numbers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libxslt/numbers.c b/libxslt/numbers.c
index 92023f8a..7969dc98 100644
--- a/libxslt/numbers.c
+++ b/libxslt/numbers.c
@@ -960,7 +960,7 @@ xsltFormatNumberConversion(xsltDecimalFormatPtr self,
     xmlChar *nprefix, *nsuffix = NULL;
     int            prefix_length, suffix_length = 0, nprefix_length, nsuffix_length;
     double  scale;
-    int            j, len;
+    int            j, len = 0;
     int     self_grouping_len;
     xsltFormatNumberInfo format_info;
     /*