patch 9.0.1055: Coverity warns for using uninitialized memory

Problem:    Coverity warns for using uninitialized memory.
Solution:   Clear the "lhs" field earlier.
diff --git a/src/version.c b/src/version.c
index 6ab6ddc..3a37956 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1055,
+/**/
     1054,
 /**/
     1053,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 43bda5f..ac321a9 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -2220,6 +2220,7 @@
     char_u	*sp;
     int		is_decl = is_decl_command(cmdidx);
     lhs_T	lhs;
+    CLEAR_FIELD(lhs);
     long	start_lnum = SOURCING_LNUM;
 
     int		has_arg_is_set_prefix = STRNCMP(arg, "ifargisset ", 11) == 0;
@@ -2244,8 +2245,6 @@
     if (p == NULL)
 	return *arg == '[' ? arg : NULL;
 
-    lhs.lhs_name = NULL;
-
     if (eap->cmdidx == CMD_increment || eap->cmdidx == CMD_decrement)
     {
 	if (VIM_ISWHITE(eap->cmd[2]))