tests: Fix tdef_test on 32bit platforms

100 minutes = 6000000000 microseconds was too big to be stored in an
unsigned long in a 32bit platform, making the test print 4294967295
instead. Let's set a smaller value to have the test happy on 32 bits.

Change-Id: Ic0d009f00a69cee59f2d3fc0b40ecdc97d81c75c
diff --git a/tests/tdef/tdef_test.c b/tests/tdef/tdef_test.c
index d874231..ede3082 100644
--- a/tests/tdef/tdef_test.c
+++ b/tests/tdef/tdef_test.c
@@ -38,7 +38,7 @@
 static struct osmo_tdef tdefs[] = {
 	{ .T=1, .default_val=100, .desc="100s" },
 	{ .T=2, .default_val=100, .unit=OSMO_TDEF_MS, .desc="100ms" },
-	{ .T=3, .default_val=100, .unit=OSMO_TDEF_M, .desc="100m" },
+	{ .T=3, .default_val=50, .unit=OSMO_TDEF_M, .desc="50m" },
 	{ .T=4, .default_val=100, .unit=OSMO_TDEF_CUSTOM, .desc="100 potatoes" },
 
 	{ .T=7, .default_val=50, .desc="Water Boiling Timeout", .min_val=20, .max_val=800 },  // default is .unit=OSMO_TDEF_S == 0