IndexError in _ecg_findpeaks_manikandan()

[cgastaud]

Describe the bug
In the function, if the window goes outside the signal length, we try (badly) to clip the window, causing an IndexError
See here

To Reproduce
Example steps to reproduce the behaviour. For instance:

signal = np.arange(5)
search_window_half = 10
i = 0
highs = np.arange(i + 1, i + search_window_half + 1)
highs = np.delete(
    highs, np.arange(np.where(highs == len(signal))[0], len(highs) + 1)  # there shouldn't be a +1 here
)

We could remove the +1, but why not simply change highs to:

highs = np.arange(i + 1, min(i + search_window_half + 1, len(signal))

and remove the if block ?

Expected behaviour
Not throw an error