fix V773 from PVS-Studio #21
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The function was exited without releasing the pointer. A memory leak is possible.
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I'm a member of the Pinguem.ru competition on finding errors in open source projects. A bug, found using PVS-Studio. Warning: V773 The function was exited without releasing the 'p' pointer. A memory leak is possible.
for example,
(https://github.com/charlesw/tesseract-vs2012/blob/master/giflib/src/gifalloc.c#L67)
etc... many places.