patch 9.0.0951: trying every character position for a match is inefficient

Problem:    Trying every character position for a match is inefficient.
Solution:   Use the start position of the match ignoring "\zs".
diff --git a/src/version.c b/src/version.c
index 9566edd..829e71d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    951,
+/**/
     950,
 /**/
     949,