Completed _scanf.c, added vsscanf.c, rewrote sscanf.c.

Added an assembler include _file.inc and changed asm code that uses struct
FILE to be independent of its size.
Fixed return codes in several files to use EOF instead of -1.


git-svn-id: svn://svn.cc65.org/cc65/trunk@1205 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/fgets.c

@@ -22,7 +22,7 @@ char* fgets (char* s, unsigned size, FILE* f)
 
        	/* Get next character */
        	c = fgetc (f);
-       	if (c == -1) {
+       	if (c == EOF) {
        	    s [i] = 0;
        	    /* Error or EOF */
        	    if (f->f_flags & _FERROR) {