Fixes for OOK Reception

@diepeterpan We needed to back these out to resolve user issues with the changes introduced in release 0.1.7 / #60

Author: NorthernMan54

src/rtl_433/pulse_slicer.c

@@ -87,8 +87,6 @@ int pulse_slicer_pcm(pulse_data_t const* pulses, r_device* device) {
 
   int const gap_limit = s_gap ? s_gap : s_reset;
   int const max_zeros = gap_limit / s_long;
-  if (s_tolerance <= 0)
-    s_tolerance = s_long / 4; // default tolerance is +-25% of a bit period
 
   // if there is a run of bit-wide toggles (preamble) tune the bit period
   int min_count = s_short == s_long ? 12 : 4;
@@ -319,8 +317,8 @@ int pulse_slicer_pwm(pulse_data_t const* pulses, r_device* device) {
   int s_sync = device->sync_width * samples_per_us;
   int s_tolerance = device->tolerance * samples_per_us;
 
-  if (s_tolerance <= 0) // From https://github.com/NorthernMan54/rtl_433_ESP/pull/65
-    s_tolerance = s_long / 4; // default tolerance is +-25% of a bit period
+//  if (s_tolerance <= 0) // From https://github.com/NorthernMan54/rtl_433_ESP/pull/65
+//    s_tolerance = s_long / 4; // default tolerance is +-25% of a bit period
 
   // check for rounding to zero
   if ((device->short_width > 0 && s_short <= 0) || (device->long_width > 0 && s_long <= 0) || (device->reset_limit > 0 && s_reset <= 0) || (device->gap_limit > 0 && s_gap <= 0) || (device->sync_width > 0 && s_sync <= 0) || (device->tolerance > 0 && s_tolerance <= 0)) {

src/rtl_433_ESP.cpp

@@ -247,7 +247,7 @@ void rtl_433_ESP::initReceiver(byte inputPin, float receiveFrequency) {
     state = radio.setBitRate(1.2);
     RADIOLIB_STATE(state, "setBitRate");
 
-    state = radio.setRxBandwidth(50); // Lowering to 125 lowered number of received signals
+    state = radio.setRxBandwidth(250); // Lowering to 125 lowered number of received signals
     RADIOLIB_STATE(state, "setRxBandwidth");
 
   } else {

src/signalDecoder.cpp

@@ -512,7 +512,7 @@ void rtl_433_DecoderTask(void* pvParameters) {
       data_t* data;
       /* clang-format off */
   data = data_make(
-                "model", "",      DATA_STRING,  "unknown",
+                "model", "",      DATA_STRING,  "undecoded signal",
                 "protocol", "",   DATA_STRING,  "signal parsing failed",
                 "duration", "",   DATA_INT,     rtl_pulses->signalDuration,
                 "rssi", "", DATA_INT,     rtl_pulses->signalRssi,