ext2sim: Ensure main() have return type and arguments

ext2sim/finds.c

@@ -46,6 +46,7 @@ endmatch(
     return (0);
 }
 
+int
 main(
     int argc,
     char *argv[])
@@ -75,6 +76,7 @@ main(
     HashStartSearch(&hs);
     while (he = HashNext(&ht, &hs))
 	printf("%s\n", he->h_key.h_name);
+    return 0;
 }
 
 char *

ext2sim/sim2simp.c

@@ -121,7 +121,8 @@ addMos(
 }
 
 
-main ()
+int
+main (int argc, char *argv[])
 {
 	int i;
 	char str[STRLEN];