Only run --fixlast logic if the schema had a version

misc-scripts/schema_patcher.pl

@@ -471,10 +471,12 @@ while ( $sth->fetch() ) {
   
   #Quick check if fix-last is active. If so we will hard-code some values
   if($opt_fixlast) {
-    $opt_fix = 1;
-    $opt_oldest = ($schema_version == $latest_release) ? $latest_release : $latest_release - 1;
-    die "Cannot use --fixlast with a schema release too far from the latest release; oldest allowed is $opt_oldest" if $schema_version < ($opt_oldest);
-    printf("--fixlast is active. Will apply patches for version %d and up (if available)\n", $opt_oldest);
+    if(defined $schema_version) {
+      $opt_fix = 1;
+      $opt_oldest = ($schema_version == $latest_release) ? $latest_release : $latest_release - 1;
+      die "Cannot use --fixlast with a schema release too far from the latest release; oldest allowed is $opt_oldest" if $schema_version < ($opt_oldest);
+      printf("--fixlast is active. Will apply patches for version %d and up (if available)\n", $opt_oldest);
+    }
   }
   
   if ( $schema_version_ok &&