patch 8.1.1312: Coverity warning for using uninitialized variable

Problem:    Coverity warning for using uninitialized variable.
Solution:   Clear exarg_T.
diff --git a/src/channel.c b/src/channel.c
index aac8656..a29414f 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -2308,6 +2308,7 @@
 	exarg_T ea;
 
 	ch_log(channel, "Executing normal command '%s'", (char *)arg);
+	vim_memset(&ea, 0, sizeof(ea));
 	ea.arg = arg;
 	ea.addr_count = 0;
 	ea.forceit = TRUE; /* no mapping */
@@ -2318,6 +2319,7 @@
 	exarg_T ea;
 
 	ch_log(channel, "redraw");
+	vim_memset(&ea, 0, sizeof(ea));
 	ea.forceit = *arg != NUL;
 	ex_redraw(&ea);
 	showruler(FALSE);
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 1e9d18e..8bab853 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1190,9 +1190,9 @@
     else
 	ret = vim_dialog_yesnocancel(VIM_QUESTION, NULL, buff, 1);
 
-    /* Init ea pseudo-structure, this is needed for the check_overwrite()
-     * function. */
-    ea.append = ea.forceit = FALSE;
+    // Init ea pseudo-structure, this is needed for the check_overwrite()
+    // function.
+    vim_memset(&ea, 0, sizeof(ea));
 
     if (ret == VIM_YES)
     {
diff --git a/src/quickfix.c b/src/quickfix.c
index 6157650..cf3b274 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -5809,6 +5809,7 @@
     {
 	exarg_T ea;
 
+	vim_memset(&ea, 0, sizeof(ea));
 	ea.arg = target_dir;
 	ea.cmdidx = CMD_lcd;
 	ex_cd(&ea);
@@ -6109,6 +6110,7 @@
 	    // appropriate ex command and executing it.
 	    exarg_T ea;
 
+	    vim_memset(&ea, 0, sizeof(ea));
 	    ea.arg = dirname_start;
 	    ea.cmdidx = (curwin->w_localdir == NULL) ? CMD_cd : CMD_lcd;
 	    ex_cd(&ea);
diff --git a/src/version.c b/src/version.c
index a9b376e..2b936d7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1312,
+/**/
     1311,
 /**/
     1310,