patch 8.2.4758: when using an LSP channel want to get the message ID

Problem:    When using an LSP channel want to get the message ID.
Solution:   Have ch_sendexpr() return the ID. (Yegappan Lakshmanan,
            closes #10202)
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 690b921..5736463 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -1660,7 +1660,7 @@
     {"ch_readraw",	1, 2, FEARG_1,	    arg2_chan_or_job_dict,
 			ret_string,	    JOB_FUNC(f_ch_readraw)},
     {"ch_sendexpr",	2, 3, FEARG_1,	    arg23_chanexpr,
-			ret_void,	    JOB_FUNC(f_ch_sendexpr)},
+			ret_any,	    JOB_FUNC(f_ch_sendexpr)},
     {"ch_sendraw",	2, 3, FEARG_1,	    arg23_chanraw,
 			ret_void,	    JOB_FUNC(f_ch_sendraw)},
     {"ch_setoptions",	2, 2, FEARG_1,	    arg2_chan_or_job_dict,