patch 8.1.0737: compiler warning for uninitialized variable

Problem:    Compiler warning for uninitialized variable.
Solution:   Add initialization. (John Marriott)
diff --git a/src/version.c b/src/version.c
index 643830a..9f4bbfc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -796,6 +796,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    737,
+/**/
     736,
 /**/
     735,