[sr-dev] new compiler warnings in master/app_lua

CC (cc) [M app_lua.so] app_lua_exp.o app_lua_exp.c: In function 'lua_sr_ndb_mongodb_cmd_x': app_lua_exp.c:2667:2: warning: missing braces around initializer [-Wmissing-braces] app_lua_exp.c:2667:2: warning: (near initialization for 'param[0]') [-Wmissing-braces] app_lua_exp.c: In function 'lua_sr_ndb_mongodb_next_reply': app_lua_exp.c:2741:2: warning: missing braces around initializer [-Wmissing-braces] app_lua_exp.c:2741:2: warning: (near initialization for 'param[0]') [-Wmissing-braces] app_lua_exp.c: In function 'lua_sr_ndb_mongodb_free_reply': app_lua_exp.c:2768:2: warning: missing braces around initializer [-Wmissing-braces] app_lua_exp.c:2768:2: warning: (near initialization for 'param[0]') [-Wmissing-braces]