Bug#712269: [tvtime] cppcheck tool discovered same severe errors in the code

[triniton adam]

Proposed patch for [tvtime] cppcheck tool discovered same errors in the
code:

intl/localcharset.c:
    - fix common realloc mistake: buffer nulled but not freed upon failure.

intl/localealias.c:
    - fix resource leak

plugins/kdetv_greedyh.c:
plugins/kdetv_tomsmocomp.c:
    - fix buffer is accessed out of bounds.

src/commands.c:
    - fix variable 'curname' is reassigned a value before the old one has
been used.

src/leetft.c:
    - fix memory leak.

src/station.c
    - fix dangerous usage of 'filename' (strncpy doesn't always
null-terminate it).
    - fix dangerous usage of strncat - 3rd parameter is the maximum number
of characters to append.

src/tvtime.c
    - fix memory leak.
    - fix the buffer may not be null-terminated after the call to strncpy().

src/tvtimeconf.c
    - fix resource leak.
    - fix the buffer may not be null-terminated after the call to strncpy().

src/utils.c
    - fix resource leak.

cppcheck.diff
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