fate: fix partial run when no samples path is specified

This restores the behaviour of running only the builtin
regression tests when no path to external samples is given.
aa3805a inadvertently broke this by always setting SAMPLES
to something.  Using := makes the ifdef test work as expected
when the FATE_SAMPLES environment variable is empty.

Signed-off-by: Mans Rullgard <mans@mansr.com>

diff --git a/configure b/configure
index dbcada5385d915d5a4e366d027cb1545dd0587c1..e86f193738d405a53591148d2c20f2aa601fe6af 100755 (executable)
--- a/configure
+++ b/configure
@@ -3270,7 +3270,7 @@ SLIB_CREATE_DEF_CMD=${SLIB_CREATE_DEF_CMD}
 SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}
 SLIB_INSTALL_EXTRA_CMD=${SLIB_INSTALL_EXTRA_CMD}
 SLIB_UNINSTALL_EXTRA_CMD=${SLIB_UNINSTALL_EXTRA_CMD}
-SAMPLES=${samples:-\$(FATE_SAMPLES)}
+SAMPLES:=${samples:-\$(FATE_SAMPLES)}
 EOF
 
 get_version(){