This makes more sense here.

curses.h

@@ -28,7 +28,7 @@ Defined by this header:
 **man-end****************************************************************/
 
 #define PDCURSES        1      /* PDCurses-only routines */
-#define PDC_BUILD    3805
+#define PDC_BUILD    3806
 #define PDC_VER_MAJOR   3
 #define PDC_VER_MINOR   8
 #define PDC_VERDOT   "3.8"
@@ -357,6 +357,7 @@ typedef struct
 #endif
     short line_color;     /* color of line attributes - default -1 */
     attr_t termattrs;     /* attribute capabilities */
+    bool  dirty;          /* redraw on napms() after init_color() */
 } SCREEN;
 
 /*----------------------------------------------------------------------

curspriv.h

@@ -47,7 +47,6 @@ extern FILE *pdc_dbfp;   /* tracing file pointer (NULL = off) */
 extern bool pdc_color_started;
 extern unsigned long pdc_key_modifiers;
 extern MOUSE_STATUS pdc_mouse_status;
-extern bool pdc_dirty;   /* redraw on napms() after init_color() */
 
 /*----------------------------------------------------------------------*/
 

pdcurses/color.c

@@ -181,12 +181,12 @@ int init_color(short color, short red, short green, short blue)
 {
     PDC_LOG(("init_color() - called\n"));
 
-    if (color < 0 || color >= COLORS || !PDC_can_change_color() ||
+    if (!SP || color < 0 || color >= COLORS || !PDC_can_change_color() ||
         red < -1 || red > 1000 || green < -1 || green > 1000 ||
         blue < -1 || blue > 1000)
         return ERR;
 
-    pdc_dirty = TRUE;
+    SP->dirty = TRUE;
 
     return PDC_init_color(color, red, green, blue);
 }

pdcurses/initscr.c

@@ -149,6 +149,7 @@ WINDOW *Xinitscr(int argc, char *argv[])
     SP->linesrippedoffontop = 0;
     SP->delaytenths = 0;
     SP->line_color = -1;
+    SP->dirty = FALSE;
 
     SP->orig_cursor = PDC_get_cursor_mode();
 

pdcurses/kernel.c

@@ -87,7 +87,6 @@ kernel
 
 RIPPEDOFFLINE linesripped[5];
 char linesrippedoff = 0;
-bool pdc_dirty = FALSE;
 
 static struct cttyset
 {
@@ -228,9 +227,9 @@ int napms(int ms)
     if (!SP)
         return ERR;
 
-    if (pdc_dirty)
+    if (SP->dirty)
     {
-        pdc_dirty = FALSE;
+        SP->dirty = FALSE;
         wrefresh(curscr);
     }