patch 8.2.2026: Coverity warns for possibly using not NUL terminated string

Problem:    Coverity warns for possibly using not NUL terminated string.
Solution:   Put a NUL in b0_hname just in case.

src/memline.c

@@ -2252,6 +2252,7 @@ swapfile_unchanged(char_u *fname)
 
 	mch_get_host_name(hostname, B0_HNAME_SIZE);
 	hostname[B0_HNAME_SIZE - 1] = NUL;
+	b0.b0_hname[B0_HNAME_SIZE - 1] = NUL; // in case of corruption
 	if (STRICMP(b0.b0_hname, hostname) != 0)
 	    ret = FALSE;
     }

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2026,
 /**/
     2025,
 /**/