Merge pull request #531 from iXce/Marlin_v1_lcd

Only clamp panel movements if software endstops are enabled

Marlin/ultralcd.cpp

     if (encoderPosition != 0)
     {
         current_position[X_AXIS] += float((int)encoderPosition) * move_menu_scale;
-        if (current_position[X_AXIS] < X_MIN_POS)
+        if (min_software_endstops && current_position[X_AXIS] < X_MIN_POS)
             current_position[X_AXIS] = X_MIN_POS;
-        if (current_position[X_AXIS] > X_MAX_POS)
+        if (max_software_endstops && current_position[X_AXIS] > X_MAX_POS)
             current_position[X_AXIS] = X_MAX_POS;
         encoderPosition = 0;
         plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 600, active_extruder);
     if (encoderPosition != 0)
     {
         current_position[Y_AXIS] += float((int)encoderPosition) * move_menu_scale;
-        if (current_position[Y_AXIS] < Y_MIN_POS)
+        if (min_software_endstops && current_position[Y_AXIS] < Y_MIN_POS)
             current_position[Y_AXIS] = Y_MIN_POS;
-        if (current_position[Y_AXIS] > Y_MAX_POS)
+        if (max_software_endstops && current_position[Y_AXIS] > Y_MAX_POS)
             current_position[Y_AXIS] = Y_MAX_POS;
         encoderPosition = 0;
         plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], 600, active_extruder);
     if (encoderPosition != 0)
     {
         current_position[Z_AXIS] += float((int)encoderPosition) * move_menu_scale;
-        if (current_position[Z_AXIS] < Z_MIN_POS)
+        if (min_software_endstops && current_position[Z_AXIS] < Z_MIN_POS)
             current_position[Z_AXIS] = Z_MIN_POS;
-        if (current_position[Z_AXIS] > Z_MAX_POS)
+        if (max_software_endstops && current_position[Z_AXIS] > Z_MAX_POS)
             current_position[Z_AXIS] = Z_MAX_POS;
         encoderPosition = 0;
         plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], homing_feedrate[Z_AXIS]/60, active_extruder);