Fix LNK2005 with Clang due to 'console_screen_t *'

Author: xv

concolors.c

@@ -23,7 +23,7 @@ void console_init(console_screen_t **ci)
 }
 
 void console_set_colors(console_color_t fg, console_color_t bg) {
-    if (bg == COLOR_NONE && fg == COLOR_NONE) {
+    if (console == NULL || (bg == COLOR_NONE && fg == COLOR_NONE)) {
         return;
     }
 

concolors.h

@@ -38,7 +38,7 @@ typedef enum _console_color {
     COLOR_BRIGHT_WHITE = 0xf
 } console_color_t;
 
-console_screen_t *console;
+extern console_screen_t *console;
 
 /**
  * @brief

main.c

@@ -73,6 +73,8 @@ const FILETIME ft_preserved = {
     0xFFFFFFFF
 };
 
+console_screen_t *console;
+
 /*!
  * @brief
  * Prints program usage information.