patch 7.4.1924

Problem:    Missing "void" for functions without argument.
Solution:   Add "void". (Hirohito Higashi)

src/ops.c

@@ -5819,14 +5819,14 @@ static yankreg_T *y_read_regs = NULL;
  * Prepare for reading viminfo registers when writing viminfo later.
  */
     void
-prepare_viminfo_registers()
+prepare_viminfo_registers(void)
 {
      y_read_regs = (yankreg_T *)alloc_clear(NUM_REGISTERS
 						    * (int)sizeof(yankreg_T));
 }
 
     void
-finish_viminfo_registers()
+finish_viminfo_registers(void)
 {
     int		i;
     int		j;