fix many compilation warnings about static variables used by non-static functions

[CC] plc_main.c -> plc_main.o
/tmp/be/build/plc_main.c:396:40: warning: ?LogBuff? is static but used in inline function ?copy_from_log? which is not static
memcpy((char*)buf + remaining, LogBuff[level], size - remaining);
^
/tmp/be/build/plc_main.c:395:22: warning: ?LogBuff? is static but used in inline function ?copy_from_log? which is not static
memcpy(buf, &LogBuff[level][buffpos], remaining);
^
...

^
/tmp/be/build/plc_debugger.c:825:20: warning: ?retain_offset? is static but used in inline function ?BufferIterator? which is not static
Retain(retain_offset, size, real_value_p);
^
/tmp/be/build/plc_debugger.c:823:47: warning: ?retain_offset? is static but used in inline function ?BufferIterator? which is not static
unsigned int next_retain_offset = retain_offset + size;
^
^

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# SOME DESCRIPTIVE TITLE.

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# Copyright (C) is 21st century inquisition

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# This file is distributed under the same license as the Beremiz package.

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# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.

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#

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#, fuzzy

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msgid ""

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msgstr ""

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"Project-Id-Version: Beremiz 1.1\n"

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# 132431d63d6e4df6a641d5f9e342832b

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#: ../../index.rst:4

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msgid "Beremiz's documentation"

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msgstr ""

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# 35991814a0c44578927d8c48b5808eb6

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#: ../../index.rst:6

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msgid "Contents:"

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msgstr ""