Avoid dictionary initialization during import in PouDialog

Because initialization happened before i18n setup, then it causes later
problems during creating new POU on non-English locales (Russian for example).

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line 2332, in OnAddPouMenu
dialog = PouDialog(self, pou_type, type_readonly)
File "/home/developer/WorkData/PLC/beremiz/beremiz/dialogs/PouDialog.py", line 101, in __init__
self.RefreshLanguage()
File "/home/developer/WorkData/PLC/beremiz/beremiz/dialogs/PouDialog.py", line 154, in RefreshLanguage
if language != "SFC" or PouDialog.POU_TYPES_DICT[self.PouType.GetStringSelection()] != "function":
KeyError: u'\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430'

/* Beremiz' header file for use by extensions */

#include "iec_types.h"

#define LOG_LEVELS 4
#define LOG_CRITICAL 0
#define LOG_WARNING 1
#define LOG_INFO 2
#define LOG_DEBUG 3

extern unsigned long long common_ticktime__;

#ifdef TARGET_LOGGING_DISABLE
#define LogMessage(level, buf, size)
#else
int     LogMessage(uint8_t level, char* buf, uint32_t size);
#endif

long AtomicCompareExchange(long* atomicvar,long compared, long exchange);