optimize pwm interrupt handler for better precision

[me-no-dev]

next timer should be set before writing to GPIO and GPIO should not be written to if no pins are attached there.

[igrr]

Thanks, I've pulled the PWM optimization fix.

• Regarding tcp status redefinition, this change breaks the following sketch (because CLOSED is not defined anymore).

  #include <ESP8266WiFi.h>
  
  void setup() {
    WiFiClient client;
    if (client.status() != CLOSED) {
      panic();
    }
  }
  
  void loop() {}

• Additional alignment for pvPortMalloc and pvPortRealloc should not be necessary because the first thing pvPortMalloc does is a call to xPortWantedSizeAlign, which aligns the size to portBYTE_ALIGNMENT.

[me-no-dev]

that CLOSED needs to be defined only once. I can't begin to explain what a pain it is to write lwip tcp backed library outside of ESP8266WiFi.
It's a real problem and needs a resolution really. Maybe lwip haders should go to the core?
Regarding alignment. That is a big issue with SDK 1.5 and definitely gets fixed with overloading the functions. But SDK 1.5 is a whole topic on it's own... I have a branch that is still on 1.3 so I can actually do some networking with the ESP.
Maybe come by gitter for a conversation?

[tablatronix]

Who wants to commit this ?

[me-no-dev]

gimme a sec and will do

[me-no-dev]

#1391