Account for DELTA in Planner::refresh_positioning

Marlin/Marlin_main.cpp

@@ -456,7 +456,7 @@ static uint8_t target_extruder;
   #define TOWER_2 Y_AXIS
   #define TOWER_3 Z_AXIS
 
-  float delta[3] = { 0 };
+  float delta[3];
   float cartesian_position[3] = { 0 };
   #define SIN_60 0.8660254037844386
   #define COS_60 0.5
@@ -489,7 +489,7 @@ static uint8_t target_extruder;
 
 #if ENABLED(SCARA)
   float delta_segments_per_second = SCARA_SEGMENTS_PER_SECOND;
-  static float delta[3] = { 0 };
+  float delta[3];
   float axis_scaling[3] = { 1, 1, 1 };    // Build size scaling, default to 1
 #endif