Fix bracket placing

Make it consistent with the rest of the code

Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
diff --git a/controller.c b/controller.c
index 5d19e7a..f95f3d8 100644
--- a/controller.c
+++ b/controller.c
@@ -735,7 +735,7 @@
 		di->data_num_probes = num_probes;
 		di->data_unitsize = unitsize;
 		di->data_samplerate = samplerate;
-		if ((ret = srd_inst_start(di, args) != SRD_OK))
+		if ((ret = srd_inst_start(di, args)) != SRD_OK)
 			break;
 	}