self-test and x64 fixes:

- headerless: distinguish between allocation granularity and min size
(hopefully fixes test failure on x64)
- test_wdbg_sym: disable printf spew
- hpet: use workaround when x64 MOVD isn't available due to processor or
compiler
- JSConversions: VC2005 x64 apparently distinguishes ssize_t from long
int (as it does with size_t)

This was SVN commit r7179.

source/scripting/JSConversions.cpp

@@ -212,6 +212,28 @@ template<> bool ToPrimitive<size_t>( JSContext* cx, jsval v, size_t& Storage )
 	return true;
 }
 
+
+template<> jsval ToJSVal<ssize_t>( const ssize_t& Native )
+{
+	return( INT_TO_JSVAL( (int)Native ) );
+}
+
+template<> jsval ToJSVal<ssize_t>( ssize_t& Native )
+{
+	return( INT_TO_JSVAL( (int)Native ) );
+}
+
+template<> bool ToPrimitive<ssize_t>( JSContext* cx, jsval v, ssize_t& Storage )
+{
+	int temp;
+	if(!ToPrimitive<int>(cx, v, temp))
+		return false;
+	if(temp < 0)
+		return false;
+	Storage = (ssize_t)temp;
+	return true;
+}
+
 #endif	// #if ARCH_AMD64
 #endif	// #if !GCC_VERSION