fix: using file descriptors instead of FILE*

we can directly write to a socket using dprintf, no need for a buffer

include/pasm.h

@@ -2,4 +2,4 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-int pasm_run_script(const char *filename, char **file, size_t lines, FILE* _fstream);
+int pasm_run_script(const char *filename, char **file, size_t lines, int _fstream);