use ++i

src/log.c

@@ -118,7 +118,7 @@ void log_set_quiet(bool enable)
 
 int log_add_callback(log_LogFn fn, void *udata, int level)
 {
-    for (int i = 0; i < MAX_CALLBACKS; i++)
+    for (int i = 0; i < MAX_CALLBACKS; ++i)
     {
         if (!L.callbacks[i].fn)
         {
@@ -163,7 +163,7 @@ void log_log(int level, const char *file, int line, const char *fmt, ...)
         va_end(ev.ap);
     }
 
-    for (int i = 0; i < MAX_CALLBACKS && L.callbacks[i].fn; i++)
+    for (int i = 0; i < MAX_CALLBACKS && L.callbacks[i].fn; ++i)
     {
         Callback *cb = &L.callbacks[i];
         if (level >= cb->level)

src/util.c

@@ -92,7 +92,7 @@ bool is_comment(char *s)
  */
 struct quickcommand *command_in_quickcommands(const char *command_key, const struct quickcommand *quickcommands, int n)
 {
-    for (int i = 0; i < n; i++)
+    for (int i = 0; i < n; ++i)
     {
         if (strcmp(command_key, quickcommands[i].name) == 0)
         {

src/vmrcli.c

@@ -191,7 +191,7 @@ int main(int argc, char *argv[])
     }
     else
     {
-        for (int i = optind; i < argc; i++)
+        for (int i = optind; i < argc; ++i)
         {
             parse_input(vmr, argv[i]);
         }