Improved previous Content-Type parser fix

Used @albrechtd's patch.

Fixes issue #181

Author: jstedfast

gmime/gmime-content-type.c

@@ -212,9 +212,10 @@ _g_mime_content_type_parse (GMimeParserOptions *options, const char *str, gint64
 
 	/* skip past any remaining junk that shouldn't be here... */
 	skip_cfws (&inptr);
-	while (*inptr && *inptr != ';') {
+	if (*inptr && *inptr != ';') {
 		_g_mime_parser_options_warn (options, offset, GMIME_WARN_INVALID_CONTENT_TYPE, str);
-		inptr++;
+		while (*inptr && *inptr != ';')
+			inptr++;
 	}
 
 	if (*inptr++ == ';' && *inptr && (params = _g_mime_param_list_parse (options, inptr, offset))) {