[rcore] fix gamepad axis movement and its automation event recording (#4184)

* [rcore] fix gamepad axis movement and its automation event recording

This commit fixes 2 issues:
- Automation events aren't recorded for negative axis movements on
  gamepads (e.g. stick going left/up)
- 'GetGamepadAxisMovement' drift check isn't working correctly for
  triggers. Axis values between [-0.1, 0.1] are clamped to 0.0

Behaviour change:
- 'GetGamepadAxisMovement' returns default value for each axis, even
  if gamepad isn't attached.

* [rcore] inline body of 'GetGamepadAxisMovementDefault' and remove it

src/rcore.c

@@ -2952,10 +2952,14 @@ int GetGamepadAxisCount(int gamepad)
 // Get axis movement vector for a gamepad
 float GetGamepadAxisMovement(int gamepad, int axis)
 {
-    float value = 0;
+    float value = (axis == GAMEPAD_AXIS_LEFT_TRIGGER || axis == GAMEPAD_AXIS_RIGHT_TRIGGER)? -1.0f : 0.0f;
 
-    if ((gamepad < MAX_GAMEPADS) && CORE.Input.Gamepad.ready[gamepad] && (axis < MAX_GAMEPAD_AXIS) &&
-        (fabsf(CORE.Input.Gamepad.axisState[gamepad][axis]) > 0.1f)) value = CORE.Input.Gamepad.axisState[gamepad][axis];      // 0.1f = GAMEPAD_AXIS_MINIMUM_DRIFT/DELTA
+    if ((gamepad < MAX_GAMEPADS) && CORE.Input.Gamepad.ready[gamepad] && (axis < MAX_GAMEPAD_AXIS)) {
+        float movement = value < 0.0f ? CORE.Input.Gamepad.axisState[gamepad][axis] : fabs(CORE.Input.Gamepad.axisState[gamepad][axis]);
+
+        // 0.1f = GAMEPAD_AXIS_MINIMUM_DRIFT/DELTA
+        if (movement > value + 0.1f) value = CORE.Input.Gamepad.axisState[gamepad][axis];
+    }
 
     return value;
 }
@@ -3599,7 +3603,8 @@ static void RecordAutomationEvent(void)
         for (int axis = 0; axis < MAX_GAMEPAD_AXIS; axis++)
         {
             // Event type: INPUT_GAMEPAD_AXIS_MOTION
-            if (CORE.Input.Gamepad.axisState[gamepad][axis] > 0.1f)
+            float defaultMovement = (axis == GAMEPAD_AXIS_LEFT_TRIGGER || axis == GAMEPAD_AXIS_RIGHT_TRIGGER)? -1.0f : 0.0f;
+            if (GetGamepadAxisMovement(gamepad, axis) != defaultMovement)
             {
                 currentEventList->events[currentEventList->count].frame = CORE.Time.frameCounter;
                 currentEventList->events[currentEventList->count].type = INPUT_GAMEPAD_AXIS_MOTION;