Memory Leaks found.

[sidgairo18]

1. Leaked_storage: Variable el going out of scope leaks the storage it points to. File src/lib_ccx/ccx_encoders_webvtt.c and function ccx_encoders_webvtt.c()

2. Leaked_storage: Variable parsebuf going out of scope leaks the storage it points to. File src/lib_ccx/general_loop.c and function rcwt_loop()