fix bsds process_open

core/os/os2/process_posix.odin

@@ -223,7 +223,6 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
 			return
 		}
 
-		process.pid = int(pid)
 		process, _ = _process_open(int(pid), {})
 		return
 	}

core/os/os2/process_posix_other.odin

@@ -15,6 +15,7 @@ _process_list :: proc(allocator: runtime.Allocator) -> (list: []int, err: Error)
 }
 
 _process_open :: proc(pid: int, flags: Process_Open_Flags) -> (process: Process, err: Error) {
+	process.pid = pid
 	err = .Unsupported
 	return
 }