* Fix compiler warnings.
* Remove unused variable.

--- a/mvcase.c
+++ b/mvcase.c
@@ -17,6 +17,10 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h> /* exit() free() realloc() */
+#include <string.h> /* strlen() strcpy() */
+#include <strings.h> /* rindex() */
+#include <ctype.h> /* tolower() toupper() */
 #include <shhopt.h>
 
 #define VERSION_INT 0
@@ -45,7 +45,7 @@
 
 int main (int argc, char **argv)
 {
-  int i,j,k;
+  int i,j;
   int static flag_upper = 0;
   int static flag_lower = 0;
   int static flag_path  = 0;