system-monitor: make omitted mem limit be 2**63 - 1.

Change-Id: I2b5b9be445363baf209e66af6199100a27e593e4

diff --git a/src/plugins/system-monitor/mem-watch.c b/src/plugins/system-monitor/mem-watch.c
index 6f3b864..f9ed3e8 100644 (file)
--- a/src/plugins/system-monitor/mem-watch.c
+++ b/src/plugins/system-monitor/mem-watch.c
@@ -537,6 +537,9 @@ static int get_limit(lua_State *L, int idx, mem_limit_t *l)
                 goto invalid;
         }
         break;
+    case LUA_TNIL:
+        l->limit = (int64_t)(((uint64_t)-1) >> 1);
+        break;
     default:
     invalid:
         l->limit = -1;