Fix UBL/Homing (#11566)

Marlin/src/module/planner.cpp

   #endif
   position[A_AXIS] = LROUND(a * axis_steps_per_mm[A_AXIS]);
   position[B_AXIS] = LROUND(b * axis_steps_per_mm[B_AXIS]);
-  position[C_AXIS] = LROUND(axis_steps_per_mm[C_AXIS] * (c +
+  position[C_AXIS] = LROUND(axis_steps_per_mm[C_AXIS] * (c +(
     #if !IS_KINEMATIC && ENABLED(AUTO_BED_LEVELING_UBL)
       leveling_active ? ubl.get_z_correction(a, b) :
     #endif
-    0
+    0)
   ));
   position[E_AXIS] = LROUND(e * axis_steps_per_mm[_EINDEX]);
   #if HAS_POSITION_FLOAT