Backing out change .. breaks build globally. Guess it is better to just have a broken HP-UX for now.

base/src/nsVariant.cpp

@@ -56,7 +56,7 @@ nsVariant::~nsVariant()
 {
     switch (mType) {
       case nsVariantType_voidPtr:
-        delete mValue;
+        delete (void *)mValue;
         break;
       case nsVariantType_charPtr:
         nsCRT::free(mValue.mUnion._charPtr);

xpcom/ds/nsVariant.cpp

@@ -56,7 +56,7 @@ nsVariant::~nsVariant()
 {
     switch (mType) {
       case nsVariantType_voidPtr:
-        delete mValue;
+        delete (void *)mValue;
         break;
       case nsVariantType_charPtr:
         nsCRT::free(mValue.mUnion._charPtr);