I know the rules. And no it wasn't a walk. Its a common mistake with fans who aren't licensed officials or know someone that is. Just ask any official.
One of South Points parents is an official, and yes it was a walk. I guess the definiton of traveling needs to be defined:
In basketball, traveling is a violation of the rules that occurs when a player holding the ball illegally moves one or both of his feet. Most commonly, a player travels by illegally moving his pivot foot or taking too many steps without dribbling the ball.
NFHS (U.S. High School)
The NFHS traveling rule is almost identically worded, with an additional article clarifying restrictions regarding a player holding the ball while on the floor.
Examples
1. Any action where the pivot foot is lifted and returned to the floor, or dragged along the floor.
2. Lifting the pivot foot before starting a dribble.
3. Taking multiple steps or shuffling the feet before starting a dribble.
4. While holding the ball, jumping and returning to the floor without releasing the ball.
5. Securing the ball while on the floor and attempting to roll over or stand up.
6. Falling to the floor while holding the ball, even if it was caught while airborne (NCAA and NFHS only) From this definition looks like she traveled. They called the save traveling violation on one of South Points players who was going after a loose ball and she slid on top of it.