Add cast for warning C4267

warning C4267: 'argument': conversion from 'size_t' to 'DWORD', possible loss of data

Author: OlafvdSpek

backward.hpp

@@ -3621,10 +3621,12 @@ template <> class TraceResolverImpl<system_tag::windows_tag>
     symOptions |= SYMOPT_LOAD_LINES | SYMOPT_UNDNAME;
     SymSetOptions(symOptions);
     EnumProcessModules(process, &module_handles[0],
-                       module_handles.size() * sizeof(HMODULE), &cbNeeded);
+                       static_cast<DWORD>(module_handles.size() * sizeof(HMODULE)), 
+		       &cbNeeded);
     module_handles.resize(cbNeeded / sizeof(HMODULE));
     EnumProcessModules(process, &module_handles[0],
-                       module_handles.size() * sizeof(HMODULE), &cbNeeded);
+                       static_cast<DWORD>(module_handles.size() * sizeof(HMODULE)), 
+		       &cbNeeded);
     std::transform(module_handles.begin(), module_handles.end(),
                    std::back_inserter(modules), get_mod_info(process));
     void *base = modules[0].base_address;