fix #525 - turn off (buggy) TinyGPS custom candidates support

platformio.ini

@@ -31,6 +31,7 @@ build_flags = -Wno-missing-field-initializers -Isrc -Isrc/mesh -Isrc/gps -Ilib/n
   -DAPP_VERSION=${sysenv.APP_VERSION}
   -DHW_VERSION=${sysenv.HW_VERSION}
   -DUSE_THREAD_NAMES
+  -DTINYGPSPLUS_OPTION_NO_CUSTOM_FIELDS
 
 ; leave this commented out to avoid breaking Windows
 ;upload_port = /dev/ttyUSB0
@@ -64,7 +65,7 @@ lib_deps =
   https://github.com/meshtastic/arduino-fsm.git#2f106146071fc7bc620e1e8d4b88dc4e0266ce39
   https://github.com/meshtastic/SparkFun_Ublox_Arduino_Library.git#31015a55e630a2df77d9d714669c621a5bf355ad
   https://github.com/meshtastic/RadioLib.git#8657380241bce681c33aab46598bbf13b11f876c
-  https://github.com/meshtastic/TinyGPSPlus.git 
+  https://github.com/meshtastic/TinyGPSPlus.git#9c1d584d2469523381e077b0b9c1bf868d6c0206
   https://github.com/meshtastic/AXP202X_Library.git#8404abb6d4b486748636bc6ad72d2a47baaf5460
   Wire ; explicitly needed here because the AXP202 library forgets to add it
   SPI