dont print color warning on color reset OSC 104 without parameter - st

commit b650256044f867851725f712fdac58d4ff294808
parent 9acec468fbeaa9f90578352b610431ca9b2d4ee4
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Fri, 15 Mar 2019 14:44:28 +0100

dont print color warning on color reset OSC 104 without parameter

also print explicitly "(null)" when printf "%s" p=NULL.

noticed when exiting mutt: printf '\x1b]104\x07'

Diffstat:
M st.c  | 5 ++++-

1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/st.c b/st.c
@@ -1865,7 +1865,10 @@ strhandle(void)
         case 104: /* color reset, here p = NULL */
             j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
             if (xsetcolorname(j, p)) {
-                fprintf(stderr, "erresc: invalid color %s\n", p);
+                if (par == 104 && narg <= 1)
+                    return; /* color reset without parameter */
+                fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
+                        j, p ? p : "(null)");
             } else {
                 /*
                  * TODO if defaultbg color is changed, borders