Update libxml to 2.7.7.

third_party/libxml/runsuite.c

Index: third_party/libxml/runsuite.c
diff --git a/third_party/libxml/runsuite.c b/third_party/libxml/runsuite.c
index 744875c7b8b30bc24cf9d003cba74344d7e38406..e6545fb5e431f27065ffa56c1250064f916a847a 100644
--- a/third_party/libxml/runsuite.c
+++ b/third_party/libxml/runsuite.c
@@ -307,7 +307,7 @@ getString(xmlNodePtr cur, const char *xpath) {
  *									*
  ************************************************************************/
 
-static int 
+static int
 xsdIncorectTestCase(xmlNodePtr cur) {
     xmlNodePtr test;
     xmlBufferPtr buf;
@@ -319,7 +319,7 @@ xsdIncorectTestCase(xmlNodePtr cur) {
     if (cur == NULL) {
         return(0);
     }
-    
+
     test = getNext(cur, "./*");
     if (test == NULL) {
         test_log("Failed to find test in correct line %ld\n",
@@ -358,7 +358,7 @@ done:
     if (rng != NULL)
         xmlRelaxNGFree(rng);
     xmlResetLastError();
-    if ((memt != xmlMemUsed()) && (extraMemoryFromResolver == 0)) {
+    if ((memt < xmlMemUsed()) && (extraMemoryFromResolver == 0)) {
 	test_log("Validation of tests starting line %ld leaked %d\n",
 		xmlGetLineNo(cur), xmlMemUsed() - memt);
 	nb_leaks++;