updated for version 7.3.973

Problem:    Compiler warnings. Crash on startup. (Tony Mechelynck)
Solution:   Change EMSG2 to EMSGN. Make array one character longer.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    973,
 /**/
     972,
 /**/