patch 9.1.2113: potential NULL pointer dereference issues

Problem:  potential NULL pointer dereference issues
          (EpheraXun)
Solution: Check returned pointer to be non NULL.
          (Yasuhiro Matsumoto)

fixes:  #19273
closes: #19274

Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/clientserver.c

@@ -42,7 +42,7 @@ server_to_input_buf(char_u *str)
     str = replace_termcodes(str, &ptr, 0, REPTERM_DO_LT, NULL);
     p_cpo = cpo_save;
 
-    if (*ptr != NUL)	// trailing CTRL-V results in nothing
+    if (ptr != NULL && *ptr != NUL)	// trailing CTRL-V results in nothing
     {
 	/*
 	 * Add the string to the input stream.

src/terminal.c

@@ -1482,9 +1482,17 @@ term_mouse_click(VTerm *vterm, int key)
     // For modeless selection mouse drag and release events are ignored, unless
     // they are preceded with a mouse down event
     static int	    ignore_drag_release = TRUE;
+    VTermState	    *state;
     VTermMouseState mouse_state;
 
-    vterm_state_get_mousestate(vterm_obtain_state(vterm), &mouse_state);
+
+    state = vterm_obtain_state(vterm);
+    if (state == NULL)
+    {
+	return FALSE;
+    }
+
+    vterm_state_get_mousestate(state, &mouse_state);
     if (mouse_state.flags == 0)
     {
 	// Terminal is not using the mouse, use modeless selection.

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2113,
 /**/
     2112,
 /**/