swaybar: fix typo in the loop over pixmaps
Fixes
@@ -435,7 +435,7 @@ static void reload_sni(struct swaybar_sni *sni, char *icon_theme,
int min_error = INT_MAX;
for (int i = 0; i < pixmaps->length; ++i) {
struct swaybar_pixmap *p = pixmaps->items[i];
- int e = abs(target_size - pixmap->size);
+ int e = abs(target_size - p->size);
if (e < min_error) {
pixmap = p;
min_error = e;
