patch 9.1.1911: build failure on Solaris with gcc 5

Problem:  build failure on Solaris Sparc with gcc 5
          (idgn23, after v9.1.1736)
Solution: Correctly initialize the key_name variable.

fixes: #18693

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/term.c

@@ -5362,7 +5362,7 @@ put_key_modifiers_in_typebuf(
     static int
 parse_csi_f_keys(int arg)
 {
-    char_u key_name[2] = "";
+    char_u key_name[2] = { 0, 0 };
 
     switch (arg)
     {

src/version.c

@@ -729,6 +729,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1911,
 /**/
     1910,
 /**/