Fixed OSC color reset without parameter->resets all colors

Adapted from (garbled) patch by wim <wim@thinkerwim.org>

Additional notes: it should reset all the colors using xloadcols().
To reproduce: set a different (theme) color using some escape code, then reset
it:

	printf '\x1b]104\x07'

1 files changed, 3 insertions, 1 deletions

diff --git a/st.c b/st.c
index 62def59..34c27ad 100644
--- a/st.c
+++ b/st.c
@@ -1932,8 +1932,10 @@ strhandle(void)
                         if (p && !strcmp(p, "?")) {
                                 osc_color_response(j, 0, 1);
                         } else if (xsetcolorname(j, p)) {
-                                if (par == 104 && narg <= 1)
+                                if (par == 104 && narg <= 1) {
+                                        xloadcols();
                                         return; /* color reset without parameter */
+                                }
                                 fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
                                         j, p ? p : "(null)");
                         } else {