2ea5de7 escape: fix wrong octescape of bad character

1 file Authored by Yu Watanabe a year ago, Committed by zbyszek a year ago,
    escape: fix wrong octescape of bad character
    
    Fixes a bug introduced by 95052df3760523e1f3bb9705c918d85aae7fb431.
    
    This also makes octescape() support NULL or zero length string.
    
    Fixes [oss-fuzz#54059](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=54059).
    
    Fixes #25643.
    
    (cherry picked from commit 76519cecc749a3d0e2054fd6db8a99143666e123)
    
        
file modified
+14 -15