Vitals - Fix respiratory depth (KAT-Advanced-Medical#763)

**When merged this pull request will:**
- Fix resp depth to stop being 1 always

### IMPORTANT

- [Development Guidelines](https://ace3.acemod.org/wiki/development/)
are read, understood and applied.
- Title of this PR uses our standard template `Component -
Add|Fix|Improve|Change|Make|Remove {changes}`.

Author: Cplhardcore

addons/vitals/functions/fnc_handleOxygenFunction.sqf

@@ -54,8 +54,8 @@ if (IN_CRDC_ARRST(_unit)) then {
     _demandVentilation = ((((_actualHeartRate * HEART_RATE_CO2_MULTIPLIER) / _anerobicPressure) + ((_previousCyclePaco2 - DEFAULT_PACO2) * 200)) max MINIMUM_VENTILATION);
 
     // Tidal Volume is modified by respiratory depth which can be supressed by opioids and pneumothroax
-    _respiratoryDepth = [((DEFAULT_RESPIRATORY_DEPTH / 10) - (_opioidDepression / 1.5)), 10] select (_unit getVariable [QEGVAR(breathing,BVMInUse), false]);
-    private _tidalVolume = GET_KAT_SURFACE_AREA(_unit) * (_respiratoryDepth / 1);
+    _respiratoryDepth = [((DEFAULT_RESPIRATORY_DEPTH) - (_opioidDepression / 1.5)), 10] select (_unit getVariable [QEGVAR(breathing,BVMInUse), false]);
+    private _tidalVolume = GET_KAT_SURFACE_AREA(_unit) * (_respiratoryDepth / 10);
 
     // Respiratory Rate Calculation
     _respiratoryRate = [((_demandVentilation / _tidalVolume)) min MAXIMUM_RR, 20] select (_unit getVariable [QEGVAR(breathing,BVMInUse), false]);
@@ -85,7 +85,7 @@ if (IN_CRDC_ARRST(_unit)) then {
     };
 } else {
     // Generated ETCO2 quadratic. Ensures ETCO2 moves with Respiratory Rate and is constantly below PaCO2 
-    _etco2 = (((-0.0416667 * (_respiratoryRate^2)) + (3.09167 * (_respiratoryRate))) * (_respiratoryDepth)) max 5;
+    _etco2 = (((-0.0416667 * (_respiratoryRate^2)) + (3.09167 * (_respiratoryRate))) * (_respiratoryDepth / 10 )) max 5;
 };
 
 private _externalPh = 0;
@@ -132,5 +132,5 @@ private _o2Sat = (((_pao2 max 1)^2.7 / ((25 - (((_pH / DEFAULT_PH) - 1) * 150))^
 
 _unit setVariable [VAR_BREATHING_RATE, (_respiratoryRate max 0), _syncValues];
 _unit setVariable [VAR_BLOOD_GAS, [_paco2, _pao2, _o2Sat, 24, _pH, _etco2], _syncValues];
-_unit setVariable [QGVAR(respiratoryDepth), ((_respiratoryDepth * 10) max 0), _syncValues];
+_unit setVariable [QGVAR(respiratoryDepth), ((_respiratoryDepth) max 0), _syncValues];
 _o2Sat * 100