Bugfix: compiler warnings #212
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```
aflibDebug.cc: In function ‘void _Z15display_messageN10aflibDebug5LevelEPKc.part.0(aflibDebug::Level, const char*)’:
aflibDebug.cc:124:42: warning: ‘
(The previous message was r...’ directive writing 36 bytes into a region of size between 1 and 1024 [-Wformat-overflow=]
124 | sprintf(buff, "%s\n(The previous message was repeated %d times.)", lastMsg, msgCount);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aflibDebug.cc:124:39: note: directive argument in the range [1, 2147483647]
124 | sprintf(buff, "%s\n(The previous message was repeated %d times.)", lastMsg, msgCount);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:980,
from aflibDebug.cc:26:
In function ‘int sprintf(char*, const char*, ...)’,
inlined from ‘void _Z15display_messageN10aflibDebug5LevelEPKc.part.0(aflibDebug::Level, const char*)’ at aflibDebug.cc:124:11:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:30:34: note: ‘__builtin___sprintf_chk’ output between 46 and 1078 bytes into a destination of size 1024
30 | return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
31 | __glibc_objsize (__s), __fmt,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
32 | __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~
aflibDebug.cc: In function ‘void _Z15display_messageN10aflibDebug5LevelEPKc.part.0(aflibDebug::Level, const char*)’:
aflibDebug.cc:128:24: warning: ‘char* __builtin_strncpy(char*, const char*, long unsigned int)’ specified bound 1024 equals destination size [-Wstringop-truncation]
128 | strncpy(lastMsg, msg, 1024);
| ^
```
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Address the overloaded-virtual warnings. And fix a few small things here and there.