fix with getPWM

Author: hoffmannjan

Adafruit_PWMServoDriver.cpp

@@ -162,8 +162,8 @@ void Adafruit_PWMServoDriver::setPWMFreq(float freq) {
  *  @brief  Gets the PWM output of one of the PCA9685 pins
  *  @param  num One of the PWM output pins, from 0 to 15
  */
-void Adafruit_PWMServoDriver::getPWM(uint8_t num) {
-  _i2c->requestFrom((uint8_t)_i2caddr, LED0_ON_L + 4 * num, 4)
+uint8_t Adafruit_PWMServoDriver::getPWM(uint8_t num) {
+  _i2c->requestFrom((uint8_t)_i2caddr, LED0_ON_L + 4 * num, (uint8_t)4);
   return _i2c->read();
 }
 

Adafruit_PWMServoDriver.h

@@ -55,7 +55,7 @@ class Adafruit_PWMServoDriver {
   void wakeup();
   void setExtClk(uint8_t prescale);
   void setPWMFreq(float freq);
-  void getPWM(uint8_t num);
+  uint8_t getPWM(uint8_t num);
   void setPWM(uint8_t num, uint16_t on, uint16_t off);
   void setPin(uint8_t num, uint16_t val, bool invert=false);