tweaks: do a comparison a bit differently in do_output() and do_deletion()

Make it clearer we're comparing the number of rows, not string lengths.

src/nano.c

@@ -1811,7 +1811,7 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
 {
     size_t current_len, i = 0;
 #ifndef NANO_TINY
-    size_t orig_lenpt = 0;
+    size_t orig_rows = 0;
 #endif
     char *char_buf = charalloc(mb_cur_max());
     int char_len;
@@ -1820,7 +1820,7 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
 
 #ifndef NANO_TINY
     if (ISSET(SOFTWRAP))
-	orig_lenpt = strlenpt(openfile->current->data);
+	orig_rows = strlenpt(openfile->current->data) / editwincols;
 #endif
 
     while (i < output_len) {
@@ -1886,7 +1886,7 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
     /* If the number of screen rows that a softwrapped line occupies
      * has changed, we need a full refresh. */
     if (ISSET(SOFTWRAP) && refresh_needed == FALSE)
-	if (strlenpt(openfile->current->data) / editwincols != orig_lenpt / editwincols)
+	if ((strlenpt(openfile->current->data) / editwincols) != orig_rows)
 	    refresh_needed = TRUE;
 #endif
 

src/text.c

@@ -92,7 +92,7 @@ char *invocation_error(const char *name)
 void do_deletion(undo_type action)
 {
 #ifndef NANO_TINY
-    size_t orig_lenpt = 0;
+    size_t orig_rows = 0;
 #endif
 
     assert(openfile->current != NULL && openfile->current->data != NULL &&
@@ -113,7 +113,7 @@ void do_deletion(undo_type action)
 	update_undo(action);
 
 	if (ISSET(SOFTWRAP))
-	    orig_lenpt = strlenpt(openfile->current->data);
+	    orig_rows = strlenpt(openfile->current->data) / editwincols;
 #endif
 
 	/* Move the remainder of the line "in", over the current character. */
@@ -184,7 +184,7 @@ void do_deletion(undo_type action)
     /* If the number of screen rows that a softwrapped line occupies
      * has changed, we need a full refresh. */
     if (ISSET(SOFTWRAP) && refresh_needed == FALSE)
-	if (strlenpt(openfile->current->data) / editwincols != orig_lenpt / editwincols)
+	if ((strlenpt(openfile->current->data) / editwincols) != orig_rows)
 	    refresh_needed = TRUE;
 #endif