patch 9.0.0075: some compilers warn for using an uninitialized variable

Problem:    Some compilers warn for using an uninitialized variable. (Tony
            Mechelynck)
Solution:   Initialize the variable.
diff --git a/src/version.c b/src/version.c
index f7cbaf8..1909fd4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    75,
+/**/
     74,
 /**/
     73,