tweaks: elide a tiny function by making a variable global

And in the bargain it makes things clearer, because the name
cutbuffer_reset() is misleading.

src/cut.c

@@ -24,15 +24,6 @@
 
 #include <string.h>
 
-static bool keep_cutbuffer = FALSE;
-		/* Should we keep the contents of the cutbuffer? */
-
-/* Indicate that we should no longer keep the contents of the cutbuffer. */
-void cutbuffer_reset(void)
-{
-	keep_cutbuffer = FALSE;
-}
-
 /* If we aren't on the last line of the file, move all the text of the
  * current line, plus the newline at the end, into the cutbuffer.  If we
  * are, move all of the text of the current line into the cutbuffer.  In
@@ -217,7 +208,7 @@ void do_copy_text(void)
 	size_t is_current_x = openfile->current_x;
 
 	if (mark_is_set || openfile->current != next_contiguous_line)
-		cutbuffer_reset();
+		keep_cutbuffer = FALSE;
 
 	do_cut_text(TRUE, mark_is_set, FALSE, FALSE);
 

src/global.c

@@ -116,6 +116,9 @@ filestruct *cutbuffer = NULL;
 		/* The buffer where we store cut text. */
 filestruct *cutbottom = NULL;
 		/* The last line in the cutbuffer. */
+bool keep_cutbuffer = FALSE;
+		/* Whether to add to the cutbuffer instead of clearing it first. */
+
 partition *filepart = NULL;
 		/* The "partition" where we store a portion of the current file. */
 openfilestruct *openfile = NULL;

src/nano.c

@@ -1618,7 +1618,7 @@ int do_mouse(void)
 		else
 #endif
 			/* The cursor moved; clean the cutbuffer on the next cut. */
-			cutbuffer_reset();
+			keep_cutbuffer = FALSE;
 
 		edit_redraw(current_save, CENTERING);
 	}
@@ -1823,7 +1823,7 @@ void do_input(void)
 	/* If we aren't cutting or copying text, and the key wasn't a toggle,
 	 * blow away the text in the cutbuffer upon the next cutting action. */
 	if (!retain_cuts)
-		cutbuffer_reset();
+		keep_cutbuffer = FALSE;
 }
 
 /* The user typed output_len multibyte characters.  Add them to the edit

src/proto.h

@@ -91,6 +91,8 @@ extern int margin;
 
 extern filestruct *cutbuffer;
 extern filestruct *cutbottom;
+extern bool keep_cutbuffer;
+
 extern partition *filepart;
 extern openfilestruct *openfile;
 extern openfilestruct *firstfile;
@@ -241,7 +243,6 @@ void precalc_multicolorinfo(void);
 #endif
 
 /* Most functions in cut.c. */
-void cutbuffer_reset(void);
 #ifndef NANO_TINY
 void cut_marked(bool *right_side_up);
 #endif