blc_program_name make possibility to change the content of blc_program_name

include/blc_tools.h

@@ -241,7 +241,7 @@ MANY_REALLOCATIONS(&values, 7);
 
 
 // If it has been initialise it points toward argv[0]. Useful to debug different program in parallel.
-extern char const *blc_program_name;
+extern char *blc_program_name;
 
 extern FILE *blc_log_file;
 typedef unsigned char uchar;

src/blc_tools.cpp

@@ -32,7 +32,7 @@
 #include "blc_text.h"
 FILE *blc_log_file = NULL;
 
-char const *blc_program_name="";
+char *blc_program_name=NULL;
 
 size_t blc_get_type_size(uint32_t type)
 {