[libxslt] Ignore imported stylesheets in xsltApplyAttributeSet

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 6b15a8fc1a27d35a2b9da8a07d5cc6b6c3f83b6d
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Tue Apr 19 12:06:24 2016 +0200

    Ignore imported stylesheets in xsltApplyAttributeSet
    
    All attribute sets are moved to the top stylesheets in the resolution
    process.

 libxslt/attributes.c |   23 +++++++++++------------
 1 files changed, 11 insertions(+), 12 deletions(-)
---
diff --git a/libxslt/attributes.c b/libxslt/attributes.c
index df7999a..196ca95 100644
--- a/libxslt/attributes.c
+++ b/libxslt/attributes.c
@@ -1172,21 +1172,20 @@ xsltApplyAttributeSet(xsltTransformContextPtr ctxt, xmlNodePtr node,
             }
 #endif
            /*
-           * Lookup the referenced attribute-set.
+           * Lookup the referenced attribute-set. All attribute sets were
+            * moved to the top stylesheet so there's no need to iterate
+            * imported stylesheets
            */
-            while (style != NULL) {
-                set = xmlHashLookup2(style->attributeSets, ncname, nsUri);
-                if (set != NULL) {
-                    xsltAttrElemPtr cur = set->attrs;
-                    while (cur != NULL) {
-                        if (cur->attr != NULL) {
-                            xsltAttribute(ctxt, node, cur->attr,
-                                cur->attr->psvi);
-                        }
-                        cur = cur->next;
+            set = xmlHashLookup2(style->attributeSets, ncname, nsUri);
+            if (set != NULL) {
+                xsltAttrElemPtr cur = set->attrs;
+                while (cur != NULL) {
+                    if (cur->attr != NULL) {
+                        xsltAttribute(ctxt, node, cur->attr,
+                            cur->attr->psvi);
                     }
+                    cur = cur->next;
                 }
-                style = xsltNextImport(style);
             }
         }
         curstr = endstr;