remove duplicate definition of tmp in uip/mhbuild.c

The tmp variable is already defined in uip/mhparse.c.
This fixes a build error on FreeBSD 13

diff --git a/uip/mhbuild.c b/uip/mhbuild.c
index a233c685cd5dc1ea5217ba306b958b574f7a9a72..c0320226daf06050cc6a303479e422f234c1a6e1 100644 (file)
--- a/uip/mhbuild.c
+++ b/uip/mhbuild.c
@@ -51,7 +51,7 @@ char *version=VERSION;
 ** Directory to place tmp files.  This must
 ** be set before these routines are called.
 */
-char *tmp;
+extern char *tmp;
 
 pid_t xpid = 0;