win: Disable some more warnings when not building with Crashpad's common.gypi

snapshot/win/process_reader_win.cc

Index: snapshot/win/process_reader_win.cc
diff --git a/snapshot/win/process_reader_win.cc b/snapshot/win/process_reader_win.cc
index a10588862f299d1c621307586f56e80d15b9a433..373124d61930f04e3fed8c82f6f0735362eaef7f 100644
--- a/snapshot/win/process_reader_win.cc
+++ b/snapshot/win/process_reader_win.cc
@@ -86,10 +86,13 @@ process_types::SYSTEM_PROCESS_INFORMATION<Traits>* GetProcessInformation(
       reinterpret_cast<process_types::SYSTEM_PROCESS_INFORMATION<Traits>*>(
           buffer->get());
   DWORD process_id = GetProcessId(process_handle);
-  do {
+  for (;;) {
     if (process->UniqueProcessId == process_id)
       return process;
-  } while (process = NextProcess(process));
+    process = NextProcess(process);
+    if (!process)
+      break;
+  }
 
   LOG(ERROR) << "process " << process_id << " not found";
   return nullptr;