patch 8.0.1337: typo in #ifdef

Problem:    Typo in #ifdef.
Solution:   Fix the #if line.
diff --git a/src/mbyte.c b/src/mbyte.c
index 54186d9c..8bef7b8 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -6487,7 +6487,7 @@
     void
 im_set_active(int active)
 {
-#  ifdef(USE_IM_CONTROL) && defined(FEAT_EVAL)
+#  if defined(USE_IM_CONTROL) && defined(FEAT_EVAL)
     if (p_imaf[0] != NUL)
 	call_imactivatefunc(p_imdisable ? FALSE : active);
 #  endif
diff --git a/src/version.c b/src/version.c
index 57c4576..6a1162b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1337,
+/**/
     1336,
 /**/
     1335,