Fixed portability problems with va_copy. In three places, calls to fstat

had to be replaced by calls to stat, because fileno is no longer available
when forcing the compiler into pure c89 (or c99) mode.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3683 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/make/gcc.mak

@@ -2,7 +2,7 @@
 # gcc Makefile for the program sources
 #
 
-CFLAGS 	= -g -O2 -Wall
+CFLAGS 	= -g -O2 -Wall -std=c89
 CC	= gcc
 LDFLAGS	=