Merge pull request #135 from badochov/compilation_fix

Removed global variable definition in header

src/helpers.c

 #include <errno.h> // errno
 #include <libgen.h> // dirname 
 
+light_loglevel_t light_loglevel;
 
 bool light_file_read_uint64(char const *filename, uint64_t *val)
 {

src/helpers.h

     LIGHT_NOTE_LEVEL
 } light_loglevel_t;
 
-light_loglevel_t light_loglevel;
+extern light_loglevel_t light_loglevel;
 
 #define LIGHT_LOG(lvl, fp, fmt, args...)\
     if(light_loglevel >= lvl)\