tweaks: move a function to the file where it is used the most

Also, fully exclude the function from the tiny version.

src/cut.c

@@ -381,9 +381,10 @@ void ingraft_buffer(linestruct *topline)
 	}
 
 	if (topline != botline) {
+#ifndef NANO_TINY
 		/* First compute the softwrapped chunks for each line in the graft. */
 		compute_the_extra_rows_per_line_from(topline);
-
+#endif
 		/* When inserting at end-of-buffer, update the relevant pointer. */
 		if (line->next == NULL)
 			openfile->filebot = botline;

src/files.c

@@ -356,16 +356,6 @@ bool has_valid_path(const char *filename)
 	return validity;
 }
 
-/* Compute and store how many extra rows each line needs when softwrapping. */
-void compute_the_extra_rows_per_line_from(linestruct *fromline)
-{
-#ifndef NANO_TINY
-	if (ISSET(SOFTWRAP))
-		for (linestruct *line = fromline; line != NULL; line = line->next)
-			line->extrarows = extra_chunks_in(line);
-#endif
-}
-
 /* This does one of three things.  If the filename is "", it just creates
  * a new empty buffer.  When the filename is not empty, it reads that file
  * into a new buffer when requested, otherwise into the existing buffer. */

src/nano.c

@@ -1009,6 +1009,14 @@ RETSIGTYPE handle_sigwinch(int signal)
 	the_window_resized = TRUE;
 }
 
+/* Compute and store how many extra rows each line needs when softwrapping. */
+void compute_the_extra_rows_per_line_from(linestruct *fromline)
+{
+	if (ISSET(SOFTWRAP))
+		for (linestruct *line = fromline; line != NULL; line = line->next)
+			line->extrarows = extra_chunks_in(line);
+}
+
 /* Reinitialize and redraw the screen completely. */
 void regenerate_screen(void)
 {

src/prototypes.h

@@ -275,7 +275,6 @@ void make_new_buffer(void);
 #ifndef NANO_TINY
 bool delete_lockfile(const char *lockfilename);
 #endif
-void compute_the_extra_rows_per_line_from(linestruct *fromline);
 bool open_buffer(const char *filename, bool new_one);
 void set_modified(void);
 void prepare_for_display(void);
@@ -418,6 +417,7 @@ void block_sigwinch(bool blockit);
 #endif
 #ifndef NANO_TINY
 RETSIGTYPE handle_sigwinch(int signal);
+void compute_the_extra_rows_per_line_from(linestruct *fromline);
 void regenerate_screen(void);
 void do_toggle(int flag);
 #endif