Avoid the Error: 'RegValue' may be used uninitialized

porthub.cpp:56:12: error: 'RegValue' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Author: franz-ms-muc

examples/Unit/PbHUB/porthub.cpp

@@ -16,7 +16,8 @@ uint16_t PortHub::hub_a_read_value(uint8_t reg) {
     Wire.write(reg | 0x06);
     Wire.endTransmission();
 
-    uint8_t RegValue_L, RegValue_H;
+    uint8_t RegValue_L = 0;
+    uint8_t RegValue_H = 0;
 
     Wire.requestFrom(_iic_addr, 2);
     while (Wire.available()) {
@@ -32,7 +33,7 @@ uint8_t PortHub::hub_d_read_value_A(uint8_t reg) {
     Wire.write(reg | 0x04);
     Wire.endTransmission();
 
-    uint8_t RegValue;
+    uint8_t RegValue = 0;
 
     Wire.requestFrom(_iic_addr, 1);
     while (Wire.available()) {