patch 8.0.0760: terminal window colors wrong with 'termguicolors'
Problem: Terminal window colors wrong with 'termguicolors'.
Solution: Add 'termguicolors' support.
diff --git a/src/proto/syntax.pro b/src/proto/syntax.pro
index cd21418..be34258 100644
--- a/src/proto/syntax.pro
+++ b/src/proto/syntax.pro
@@ -32,6 +32,7 @@
void hl_set_bg_color_name(char_u *name);
void hl_set_fg_color_name(char_u *name);
int get_cterm_attr_idx(int attr, int fg, int bg);
+int get_tgc_attr_idx(int attr, guicolor_T fg, guicolor_T bg);
int get_gui_attr_idx(int attr, guicolor_T fg, guicolor_T bg);
void clear_hl_tables(void);
int hl_combine_attr(int char_attr, int prim_attr);