lazy initialization of highlight pens and brushes for DebugVariableViewer
Constructors wx.Pen() and wx.Brush() require wx.App to exist already.
That causes crash during import of the control,
because import is done before calling main application code.
/* 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__;
int LogMessage(uint8_t level, char* buf, uint32_t size);
long AtomicCompareExchange(long* atomicvar,long compared, long exchange);