Reviewed by Adele.

    Reviewed by Adele.

        Fixes <rdar://problem/4498338> JavaScriptCore fails to compile for ppc64
        Other 64 bit build fixes.

        * kjs/collector.cpp:
        (KJS::Collector::markOtherThreadConservatively): test for __DARWIN_UNIX03 and use __r1
        * kjs/dtoa.cpp:
        (Bigint::): cast PRIVATE_mem to unsigned to prevent warning
        * bindings/jni/jni_utility.cpp:
        (KJS::Bindings::getJavaVM): cast jniError to long to prevent format warning
        (KJS::Bindings::getJNIEnv): cast jniError to long to prevent format warning
        * bindings/runtime_root.cpp:
        (KJS::Bindings::addNativeReference): cast CFDictionaryGetValue to unsigned long to prevent warning
        (KJS::Bindings::removeNativeReference): cast CFDictionaryGetValue to unsigned long to prevent warning

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@13658 268f45cc-cd09-0410-ab3c-d52691b4dbfc