updated for version 7.4.620
Problem:    Compiler warning for unitinialized variable. (Tony Mechelynck)
Solution:   Initialize "did_free". (Ben Fritz)
diff --git a/src/version.c b/src/version.c
index 8bf1fbb..f46f917 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    620,
+/**/
     619,
 /**/
     618,