Fix perror argument File* to char*

[StidOfficial]

For fix warning to perror required char* argument

Error :

main.c:33:24: attention : passing argument 1 of « perror » from incompatible pointer type [-Wincompatible-pointer-types]
                 perror(hdrout);
                        ^~~~~~
In file included from xsdc.h:5:0,
                 from main.h:3,
                 from main.c:1:
/usr/include/stdio.h:848:13: note : expected « const char * » but argument is of type « FILE * {alias struct _IO_FILE *} »
 extern void perror (const char *__s);
             ^~~~~~