*: more portability fixes by Dan Fandrich

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/bbsh.c b/shell/bbsh.c
index ad875ab..c372626 100644
--- a/shell/bbsh.c
+++ b/shell/bbsh.c
@@ -54,7 +54,7 @@
 	int flags;		// exit, suspend, && ||
 	int pid;		// pid (or exit code)
 	int argc;
-	char *argv[0];
+	char *argv[];
 };
 
 // A collection of processes piped into/waiting on each other.