Update hmRadio.h

changes requested by @aschiffler regarding hmRadio.h

tools/esp8266/hmRadio.h

@@ -172,16 +172,17 @@ class HmRadio {
                 // 4 bytes control data
                 // Power Limit fix point 10 eg. 30 W --> 0d300 = 0x012c
                 // -1 = 0xffff --> no limit
-                if (data[0] == 0xffff){
-                    data[0] &= 0xffff; // ToDo: unlimit value is needed and is inverter specific! --> get it via RF from inverter or via user interface
+                uint16_t powerLimit = data[0];
+                uint16_t powerLimitSetting = data[1];
+                if (powerLimit == 0xffff){
+                    powerLimit &= 0xffff; // ToDo: unlimit value is needed and is inverter specific! --> get it via RF from inverter or via user interface
                 } else {
-                    data[0] *= 10; // will overwrite the data bc it is a pointer
+                    powerLimit *= 10; // will overwrite the data bc it is a pointer
                 }
-                mTxBuf[10 + (++cnt)] = (data[0] >> 8) & 0xff; // power limit
-                mTxBuf[10 + (++cnt)] = (data[0]     ) & 0xff; // power limit
-                mTxBuf[10 + (++cnt)] = (data[1] >> 8) & 0xff; // setting for persistens handling
-                mTxBuf[10 + (++cnt)] = (data[1]     ) & 0xff; // setting for persistens handling
-                data[0] /= 10; // UGLY!
+                mTxBuf[10 + (++cnt)] = (powerLimit >> 8) & 0xff; // power limit
+                mTxBuf[10 + (++cnt)] = (powerLimit     ) & 0xff; // power limit
+                mTxBuf[10 + (++cnt)] = (powerLimitSetting >> 8) & 0xff; // setting for persistens handling
+                mTxBuf[10 + (++cnt)] = (powerLimitSetting     ) & 0xff; // setting for persistens handling
             }
             // crc control data
             uint16_t crc = crc16(&mTxBuf[10], cnt+1);