patch 8.2.4071: Vim9: no detection of return in try/endtry

Problem:    Vim9: no detection of return in try/endtry. (Dominique Pellé)
Solution:   Check if any of the blocks inside try/endtry did not end in
            return.

src/vim9compile.c

@@ -3041,7 +3041,6 @@ compile_def_function(
 		    break;
 	    case CMD_endtry:
 		    line = compile_endtry(p, &cctx);
-		    cctx.ctx_had_return = FALSE;
 		    break;
 	    case CMD_throw:
 		    line = compile_throw(p, &cctx);