fnsince.pl: Fix next version value to match new versioning scheme.

build-scripts/fnsince.pl

@@ -46,9 +46,15 @@ my @releases = sort {
 
 # this happens to work for how SDL versions things at the moment.
 my $current_release = $releases[-1];
-my @current_release_segments = split /\./, $current_release;
-@current_release_segments[2] = '' . ($current_release_segments[2] + 2);
-my $next_release = join('.', @current_release_segments);
+my $next_release;
+
+if ($current_release eq '2.0.22') {  # Hack for our jump from 2.0.22 to 2.24.0...
+    $next_release = '2.24.0';
+} else {
+    my @current_release_segments = split /\./, $current_release;
+    @current_release_segments[1] = '' . ($current_release_segments[1] + 2);
+    $next_release = join('.', @current_release_segments);
+}
 
 #print("\n\nSORTED\n");
 #foreach (@releases) {