commit bd644709daa2a689b354c7aa326d329f2e4adc3b
from: Omar Polo <op@omarpolo.com>
date: Sun Jul 18 18:34:45 2021 UTC

arithmetic on void pointers is a GNU extension apparently

Another useful warning got thanks to -pedantic.

commit - 2aeddf9c1b0f33b94a01a0c307e3408b89e746c5
commit + bd644709daa2a689b354c7aa326d329f2e4adc3b
blob - e0c55ede036adf31c63125cb0bc73acbbfb83e08
blob + 0d4f8c513a1746277dbe82b4e81e8e060cda0d66
--- ui.c
+++ ui.c
@@ -151,14 +151,15 @@ static void
 restore_curs_x(struct buffer *buffer)
 {
 	struct vline	*vl;
-	const char	*prfx;
+	const char	*prfx, *text;
 
 	vl = buffer->current_line;
 	if (vl == NULL || vl->line == NULL)
 		buffer->curs_x = buffer->cpoff = 0;
-	else if (vl->parent->data != NULL)
-		buffer->curs_x = utf8_snwidth(vl->parent->data+1, buffer->cpoff) + 1;
-	else
+	else if (vl->parent->data != NULL) {
+		text = vl->parent->data;
+		buffer->curs_x = utf8_snwidth(text + 1, buffer->cpoff) + 1;
+	} else
 		buffer->curs_x = utf8_snwidth(vl->line, buffer->cpoff);
 
 	buffer->curs_x += x_offset;