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/Makefile

@@ -116,6 +116,7 @@ S_OBJS = 	_fdesc.o	\
 		vcprintf.o	\
 		vfprintf.o	\
 		vsprintf.o	\
+                vsscanf.o       \
 		zerobss.o