Declare function before use, reduces compiler warning noise.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3490 c046a42c-6fe2-441c-8c8c-71466251a162

slirp/misc.c

@@ -601,6 +601,8 @@ relay(s)
 #endif
 
 #ifdef CONFIG_QEMU
+extern void term_vprintf(const char *fmt, va_list ap);
+
 void lprint(const char *format, ...)
 {
     va_list args;