Print %p as void* not PyObject*

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/CExtNodes.java

@@ -3421,7 +3421,7 @@ Object doGeneric(String format, Object vaList) {
                             break;
                         case 'p':
                             // %p
-                            result.append("0x").append(Long.toHexString(getPyObject(getVaArgsNode, vaList, vaArgIdx).hashCode()));
+                            result.append(getVaArgsNode.getVoidPtr(vaList, vaArgIdx).toString());
                             vaArgIdx++;
                             valid = true;
                             break;