Only display battery stats if a battery is present

src/hud_elements.cpp

@@ -579,6 +579,7 @@ void HudElements::vkbasalt(){
 }
 
 void HudElements::battery_percent(){
+    if (Battery_Stats.batt_count > 0) {
         if (HUDElements.params->enabled[OVERLAY_PARAM_ENABLED_battery_percent]){
             ImGui::TableNextRow(); ImGui::TableNextColumn();
             ImGui::TextColored(HUDElements.colors.battery, "BATT");
@@ -586,7 +587,6 @@ void HudElements::battery_percent(){
             right_aligned_text(HUDElements.colors.text, HUDElements.ralign_width, "%.0f", Battery_Stats.current_percent);
             ImGui::SameLine(0,1.0f);
             ImGui::Text("%%");
-
         }
 
         if (HUDElements.params->enabled[OVERLAY_PARAM_ENABLED_battery_percent] && HUDElements.params->enabled[OVERLAY_PARAM_ENABLED_battery_power]){
@@ -617,6 +617,7 @@ void HudElements::battery_percent(){
             }
         }
     }
+}
 
 
 void HudElements::graphs(){