suppress warnings about easch <applet>_main() having

no preceding prototype

shell/ash.c

@@ -7900,8 +7900,8 @@ static void read_profile(const char *);
  * is used to figure out how far we had gotten.
  */
 
-int
-ash_main(int argc, char **argv)
+int ash_main(int argc, char **argv);
+int ash_main(int argc, char **argv)
 {
 	char *shinit;
 	volatile int state;

shell/bbsh.c

@@ -198,6 +198,7 @@ static void handle(char *command)
 	}
 }
 
+int bbsh_main(int argc, char *argv[]);
 int bbsh_main(int argc, char *argv[])
 {
 	char *command=NULL;

shell/hush.c

@@ -2686,6 +2686,7 @@ static void setup_job_control(void)
 	tcsetpgrp(shell_terminal, shell_pgrp);
 }
 
+int hush_main(int argc, char **argv);
 int hush_main(int argc, char **argv)
 {
 	int opt;

shell/lash.c

@@ -1502,6 +1502,7 @@ static inline void setup_job_control(void)
 }
 #endif
 
+int lash_main(int argc_l, char **argv_l);
 int lash_main(int argc_l, char **argv_l)
 {
 	unsigned opt;

shell/msh.c

@@ -5097,6 +5097,7 @@ static void freehere(int area)
  * shell
  */
 
+int msh_main(int argc, char **argv);
 int msh_main(int argc, char **argv)
 {
 	int f;