Fix crash on exit if a process is currently running

src/process.h

@@ -14,6 +14,7 @@
 #include <boost/process.hpp>
 
 #include "config.h"
+#include "platform/common.h"
 #include "utility.h"
 
 namespace proc {
@@ -116,5 +117,8 @@ namespace proc {
   std::optional<proc::proc_t>
   parse(const std::string &file_name);
 
+  std::unique_ptr<platf::deinit_t>
+  init();
+
   extern proc_t proc;
 }  // namespace proc