Sanity check homing bumps

Marlin/SanityCheck.h

@@ -48,7 +48,7 @@
   #error "You are using an old Configuration_adv.h file, update it before building Marlin."
 #endif
 
- /**
+/**
  * Warnings for old configurations
  */
 #if WATCH_TEMP_PERIOD > 500
@@ -450,6 +450,13 @@
 
 #endif
 
+/**
+ * Homing Bump
+ */
+#if X_HOME_BUMP_MM < 0 || Y_HOME_BUMP_MM < 0 || Z_HOME_BUMP_MM < 0
+  #error "[XYZ]_HOME_BUMP_MM must be greater than or equal to 0."
+#endif
+
 /**
  * Make sure Z_SAFE_HOMING point is reachable
  */