win: Get Crashpad compiling under VS2015

client/crashpad_client_win.cc

Index: client/crashpad_client_win.cc
diff --git a/client/crashpad_client_win.cc b/client/crashpad_client_win.cc
index b2ab03a03112e4e727b7d33422406dac59ed98f0..e19aa7469d81a8015f5bd9bc70a52f97761ab999 100644
--- a/client/crashpad_client_win.cc
+++ b/client/crashpad_client_win.cc
@@ -118,8 +118,8 @@ bool CrashpadClient::SetHandler(const std::string& ipc_port) {
   }
 
   // The server returns these already duplicated to be valid in this process.
-  g_signal_exception =
-      reinterpret_cast<HANDLE>(response.registration.request_report_event);
+  g_signal_exception = reinterpret_cast<HANDLE>(
+      static_cast<uintptr_t>(response.registration.request_report_event));
   return true;
 }