cleanup: remove NULL checks before free() all over the code

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32624 b3059339-0415-0410-9bf9-f77b7e298cf2

input/lirc.c

@@ -115,10 +115,8 @@ int mp_input_lirc_read(int fd,char* dest, int s) {
 
 void
 mp_input_lirc_close(int fd) {
-  if(cmd_buf) {
-    free(cmd_buf);
-    cmd_buf = NULL;
-  }
+  free(cmd_buf);
+  cmd_buf = NULL;
   lirc_freeconfig(lirc_config);
   lirc_deinit();
 }