Fix old-style function definition in qsort.c

Author: kojix2

ext/numo/narray/gen/tmpl/qsort.c

@@ -76,11 +76,7 @@
         (es) % sizeof(long) ? 2 : (es) == sizeof(long)? 0 : 1;
 
 static inline void
-swapfunc(a, b, n, swaptype)
-     char       *a,
-     *b;
-     size_t          n;
-     int                     swaptype;
+swapfunc(char *a, char *b, size_t n, int swaptype)
 {
     if (swaptype <= 1)
         swapcode(long, a, b, n);