[PATCH:libSM] Stop compiling empty sm_auth.c stub

[Alan Coopersmith]

File exists as a placeholder in case someone someday decides to add
additional auth methods on top of what libICE provides, but it's been
two decades and no one has, so stop spending time compiling & linking
for now.

Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
---
 src/Makefile.am |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Makefile.am b/src/Makefile.am
index a094ccc..ace113b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -17,7 +17,6 @@ endif
 
 libSM_la_SOURCES = \
 	SMlibint.h \
-	sm_auth.c \
 	sm_client.c \
 	sm_error.c \
 	sm_genid.c \
@@ -25,6 +24,8 @@ libSM_la_SOURCES = \
 	sm_misc.c \
 	sm_process.c
 
+EXTRA_DIST = sm_auth.c
+
 smincludedir=$(includedir)/X11/SM
 sminclude_HEADERS=\
 	$(top_srcdir)/include/X11/SM/SM.h \
-- 
1.7.9.2