awk: fix corner case in awk_printf

Example where it wasn't working:
    awk 'BEGIN { printf "qwe %s rty %c uio\n", "a", 0, "c" }'
- the NUL printing in %c caused premature stop of printing.

function                                             old     new   delta
awk_printf                                           593     596      +3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/editors/awk.c b/editors/awk.c
index 6c60a0615..465033f5f 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2359,11 +2359,11 @@ static char *awk_printf(node *n, size_t *len)
                  *  printf "%99999s", "BOOM"
                  */
                 if (c == 'c') {
-                        c = is_numeric(arg) ? getvar_i(arg) : *getvar_s(arg);
-                        s = xasprintf(s, c);
-                        /* + 1 if c == NUL: handle printf "%c" 0 case
+                        char cc = is_numeric(arg) ? getvar_i(arg) : *getvar_s(arg);
+                        s = xasprintf(s, cc);
+                        /* + 1 if cc == NUL: handle printf "%c" 0 case
                          * (and printf "%22c" 0 etc, but still fails for e.g. printf "%-22c" 0) */
-                        slen = strlen(s) + (c == '\0');
+                        slen = strlen(s) + (cc == '\0');
                 } else {
                         if (c == 's') {
                                 s = xasprintf(s, getvar_s(arg));