PR# 19969 Potential buffer overflow in EiffelVision GTK binding

When compiling the C code for the GTK binding with gcc, it complains about potential buffer overflow in ev_c_util.c:

```c
			if ( strlen (log_domain) + strlen (level) > 999 )
				sprintf (buf, "%s-%s\n", log_domain, level);
			else
				sprintf (buf, "GTK-%s\n", level);
```

The two lines should be inverted, and a "+1" should be added for the hyphen.
Here is a reorganization of the nested if-statements:

```c
		if ( strlen (log_domain) + strlen (level) + strlen (message) + 2 < 1000 )
			sprintf (buf, "%s-%s %s", log_domain, level, message);
		else if ( strlen (log_domain) + strlen (level) + 1 < 1000 )
			sprintf (buf, "%s-%s\n", log_domain, level);
		else
			sprintf (buf, "GTK-%s\n", level);
```

--
Eric Bezault

Applied
see https://github.com/EiffelSoftware/es-libraries/commit/c4d4def6f4182f1707e39be03627c5fef1c7b9cb

See https://github.com/EiffelSoftware/es-libraries/pull/5