Codechange: add annotation to selectively force inlining in debug build

src/vehicle_base.h

@@ -512,7 +512,7 @@ public:
 	 * Check if the vehicle is a ground vehicle.
 	 * @return True iff the vehicle is a train or a road vehicle.
 	 */
-	inline bool IsGroundVehicle() const
+	debug_inline bool IsGroundVehicle() const
 	{
 		return this->type == VEH_TRAIN || this->type == VEH_ROAD;
 	}
@@ -924,7 +924,7 @@ public:
 	 * Check if the vehicle is a front engine.
 	 * @return Returns true if the vehicle is a front engine.
 	 */
-	inline bool IsFrontEngine() const
+	debug_inline bool IsFrontEngine() const
 	{
 		return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
 	}