Fix hash callback signatures

Make sure that all parameters and return values of hash callback
functions exactly match the callback function type. This is required
to pass clang's Control Flow Integrity checks and to allow compilation
to asm.js with Emscripten.

Fixes bug 784861.

1 files changed, 6 insertions, 1 deletions

diff --git a/xmlreader.c b/xmlreader.c
index 34c4c6bc..4053269b 100644
--- a/xmlreader.c
+++ b/xmlreader.c
@@ -491,6 +491,11 @@ xmlTextReaderFreeNode(xmlTextReaderPtr reader, xmlNodePtr cur) {
     }
 }
 
+static void
+xmlTextReaderFreeIDTableEntry(void *id, const xmlChar *name ATTRIBUTE_UNUSED) {
+    xmlFreeID((xmlIDPtr) id);
+}
+
 /**
  * xmlTextReaderFreeIDTable:
  * @table:  An id table
@@ -499,7 +504,7 @@ xmlTextReaderFreeNode(xmlTextReaderPtr reader, xmlNodePtr cur) {
  */
 static void
 xmlTextReaderFreeIDTable(xmlIDTablePtr table) {
-    xmlHashFree(table, (xmlHashDeallocator) xmlFreeID);
+    xmlHashFree(table, xmlTextReaderFreeIDTableEntry);
 }
 
 /**