[CC1101] Replace abs() with fabs()

src/modules/CC1101/CC1101.cpp

@@ -478,7 +478,7 @@ int16_t CC1101::setRxBandwidth(float rxBw) {
   for(int8_t e = 3; e >= 0; e--) {
     for(int8_t m = 3; m >= 0; m --) {
       float point = (CC1101_CRYSTAL_FREQ * 1000000.0)/(8 * (m + 4) * ((uint32_t)1 << e));
-      if(abs((rxBw * 1000.0) - point) <= 1000) {
+      if(fabs(rxBw * 1000.0) - point) <= 1000) {
         // set Rx channel filter bandwidth
         return(SPIsetRegValue(CC1101_REG_MDMCFG4, (e << 6) | (m << 4), 7, 4));
       }