🩹 Fix Formbot T-Rex 2+ X2 max position

[thisiskeithb]

Description

While running the build_all_examples script, this config would not build:

In file included from Marlin/src/HAL/AVR/../../inc/MarlinConfigPre.h:56:0,
                 from Marlin/src/HAL/AVR/../../inc/MarlinConfig.h:28,
                 from Marlin/src/HAL/AVR/HAL.cpp:24:
Marlin/src/HAL/AVR/../../inc/../../Configuration_adv.h:823:24: error: floating constant in preprocessor expression
   #define X2_MAX_POS   434.6      // The max position of the X2 carriage, typically also the home position
                        ^

Rounding X2_MAX_POS down to 434 prevents the error and allows the config to build.

Benefits

Config now builds.

Related Issues

• Build All Configurations Status - May 2024 #1052

[thisiskeithb]

Talking with @InsanityAutomation, he says that we need to allow floats in MIN/MAX positions for proper IDEX operation, so that will need to get fixed upstream.

[thisiskeithb]

Apparently these TREX configs are very broken according to @InsanityAutomation, so I'll just close this for now as they won't work anyway.