Pop up warning when engine manual is not available

Help clicks on the engine dialog pop up a warning when the manual is
not found. It seems useful to alert the user that this info has to
come from the manual of the engine' rather than XBoard's.

diff --git a/dialogs.c b/dialogs.c
index d8f1684..fa481d3 100644 (file)
--- a/dialogs.c
+++ b/dialogs.c
@@ -2555,7 +2555,7 @@ DisplayHelp (char *name)
        } else textPtr = NULL;   // use plaintext man file directly
        GetHelpText(f, name);
        fclose(f);
-    }
+    } else if(currentCps) DisplayNote("No manual is installed for this engine");
 }
 
 #define PAUSE_BUTTON "P"