Sanity check probe offsets must be integers

Marlin/src/inc/SanityCheck.h

@@ -985,6 +985,9 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
 
 #if HAS_BED_PROBE
 
+  static_assert(FLOOR(float(X_PROBE_OFFSET_FROM_EXTRUDER)) == float(X_PROBE_OFFSET_FROM_EXTRUDER), "X_PROBE_OFFSET_FROM_EXTRUDER must be an integer!");
+  static_assert(FLOOR(float(Y_PROBE_OFFSET_FROM_EXTRUDER)) == float(Y_PROBE_OFFSET_FROM_EXTRUDER), "Y_PROBE_OFFSET_FROM_EXTRUDER must be an integer!");
+
   /**
    * Z_PROBE_SLED is incompatible with DELTA
    */