editor: fix incorrect variable reference

The variable used for setting the cursor isn't used anymore and
was used uninitialized. It's simply deleted now and the correct var is used.

This was only a problem if editor_insert_text_block() was used directly,
the snippet code path doesn't reach to it.

src/editor.c

@@ -2458,7 +2458,6 @@ void editor_insert_text_block(GeanyEditor *editor, const gchar *text, gint inser
 	gint line_start = sci_get_line_from_position(sci, insert_pos);
 	GString *buf;
 	const gchar *eol = editor_get_eol_char(editor);
-	gint idx;
 	GSList *jump_locs, *item;
 
 	g_return_if_fail(text);
@@ -2475,6 +2474,7 @@ void editor_insert_text_block(GeanyEditor *editor, const gchar *text, gint inser
 		/* count indent size up to insert_pos instead of asking sci
 		 * because there may be spaces after it */
 		gchar *tmp = sci_get_line(sci, line_start);
+		gint idx;
 
 		idx = insert_pos - sci_get_position_from_line(sci, line_start);
 		tmp[idx] = '\0';
@@ -2516,7 +2516,7 @@ void editor_insert_text_block(GeanyEditor *editor, const gchar *text, gint inser
 
 	/* Set cursor to the requested index, or by default to after the snippet */
 	if (cursor_index >= 0)
-		sci_set_current_position(sci, insert_pos + idx, FALSE);
+		sci_set_current_position(sci, insert_pos + cursor_index, FALSE);
 	else if (jump_locs == NULL)
 		sci_set_current_position(sci, insert_pos + buf->len, FALSE);