Allow control characters inside escape sequences

Taken from vt100 manual programmer:

	Control characters (codes \0 to \37 inclusive) are specifically
	excluded from the control sequence syntax, but may be embedded
	within a control sequence. Embedded control characters are executed
	as soon as they are encountered by the VT100. The processing of the
	control sequence then continues with the next character received.
---
 st.c |   68 +++++++++++++++++++++++++++++++++---------------------------------
 1 file changed, 34 insertions(+), 34 deletions(-)

1 files changed, 34 insertions, 34 deletions

diff --git a/st.c b/st.c
index 515dfb1..2767d54 100644
--- a/st.c
+++ b/st.c
@@ -1668,6 +1668,32 @@ tputc(char *c, int len) {
         if(iofd != -1)
                 write(iofd, c, len);
 
+        switch(ascii) {
+        case '\t':
+                tputtab(1);
+                return;
+        case '\b':
+                tmoveto(term.c.x-1, term.c.y);
+                return;
+        case '\r':
+                tmoveto(0, term.c.y);
+                return;
+        case '\f':
+        case '\v':
+        case '\n':
+                /* go to first col if the mode is set */
+                tnewline(IS_SET(MODE_CRLF));
+                return;
+        case '\a':
+                if(!(xw.state & WIN_FOCUSED))
+                        xseturgency(1);
+                return;
+        case '\033':
+                csireset();
+                term.esc = ESC_START;
+                return;
+        }
+
         if(term.esc & ESC_START) {
                 if(term.esc & ESC_CSI) {
                         csiescseq.buf[csiescseq.len++] = ascii;
@@ -1791,40 +1817,14 @@ tputc(char *c, int len) {
         } else {
                 if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
                         sel.bx = -1;
-                switch(ascii) {
-                case '\t':
-                        tputtab(1);
-                        break;
-                case '\b':
-                        tmoveto(term.c.x-1, term.c.y);
-                        break;
-                case '\r':
-                        tmoveto(0, term.c.y);
-                        break;
-                case '\f':
-                case '\v':
-                case '\n':
-                        /* go to first col if the mode is set */
-                        tnewline(IS_SET(MODE_CRLF));
-                        break;
-                case '\a':
-                        if(!(xw.state & WIN_FOCUSED))
-                                xseturgency(1);
-                        break;
-                case '\033':
-                        csireset();
-                        term.esc = ESC_START;
-                        break;
-                default:
-                        if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
-                                if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
-                                        tnewline(1); /* always go to first col */
-                                tsetchar(c);
-                                if(term.c.x+1 < term.col)
-                                        tmoveto(term.c.x+1, term.c.y);
-                                else
-                                        term.c.state |= CURSOR_WRAPNEXT;
-                        }
+                if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
+                        if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+                                tnewline(1); /* always go to first col */
+                        tsetchar(c);
+                        if(term.c.x+1 < term.col)
+                                tmoveto(term.c.x+1, term.c.y);
+                        else
+                                term.c.state |= CURSOR_WRAPNEXT;
                 }
         }
 }