patch 9.0.1900: Configure script uses non-portable == comparison

Problem:  Configure script uses non-portable == comparison
Solution: Use the standard and portable "=" instead

closes: #13095
closes: #13099

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>
diff --git a/src/version.c b/src/version.c
index 4576d5a..edfd635 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1900,
+/**/
     1899,
 /**/
     1898,