UBLOX_CFG_NAVSPG_INFIL_MINELEV should be UBX_CFG_I1

[PaulZC]

We need to change this line:

SparkFun_u-blox_GNSS_v3/src/u-blox_config_keys.h

Line 1022 in 939754f

const uint32_t UBLOX_CFG_NAVSPG_INFIL_MINELEV = UBX_CFG_U1 | 0x201100a4; // Minimum elevation for a GNSS satellite to be used in navigation

The type should be UBX_CFG_I1 (8-bit signed), not UBX_CFG_U1 (8-bit unsigned).

You would probably never notice, unless you try to set a negative elevation limit.