Fix a bunch of implicit casts detected by the Win64 compiler

preparser/preparser-process.cc

Index: preparser/preparser-process.cc
diff --git a/preparser/preparser-process.cc b/preparser/preparser-process.cc
index 368f63f6ce5d7149508df0ebf273ce9a639dcf75..169ef547eef8656dce1a764532394d3cca67fddb 100644
--- a/preparser/preparser-process.cc
+++ b/preparser/preparser-process.cc
@@ -202,7 +202,7 @@ void fail(v8::PreParserData* data, const char* message, ...) {
   fflush(stderr);
   if (data != NULL) {
     // Print preparser data to stdout.
-    uint32_t size = data->size();
+    uint32_t size = static_cast<uint32_t>(data->size());
     fprintf(stderr, "LOG: data size: %u\n", size);
     if (!WriteBuffer(stdout, data->data(), size)) {
       perror("ERROR: Writing data");
@@ -232,7 +232,7 @@ struct ExceptionExpectation {
 
 void CheckException(v8::PreParserData* data,
                     ExceptionExpectation* expects) {
-  PreparseDataInterpreter reader(data->data(), data->size());
+  PreparseDataInterpreter reader(data->data(), static_cast<int>(data->size()));
   if (expects->throws) {
     if (!reader.throws()) {
       if (expects->type == NULL) {