little clean up.

diff --git a/st.c b/st.c
index ee79a33..ff43706 100755 (executable)
--- a/st.c
+++ b/st.c
@@ -208,12 +208,10 @@ die(const char *errstr, ...) {
 
 void
 execsh(void) {
-       char *shell = getenv("SHELL");
-       if(!shell)
-               shell = "/bin/sh";
-       char *args[3] = {shell, "-i", NULL};
+       char *args[3] = {getenv("SHELL"), "-i", NULL};
+       DEFAULT(args[0], "/bin/sh"); /* default shell if getenv() failed */
        putenv("TERM=" TNAME);
-       execvp(shell, args);
+       execvp(args[0], args);
 }
 
 void