[build] try to fix brew build error

src/lnav.cc

@@ -1191,7 +1191,7 @@ looper()
         define_key("\033Oc", KEY_END);
 
         view_colors& vc = view_colors::singleton();
-        view_colors::init();
+        view_colors::init(false);
 
         auto ecb_guard
             = lnav_data.ld_exec_context.add_error_callback([](const auto& um) {
@@ -2982,7 +2982,7 @@ SELECT tbl_name FROM sqlite_master WHERE sql LIKE 'CREATE VIRTUAL TABLE%'
                 textview_curses *log_tc, *text_tc, *tc;
                 bool output_view = true;
 
-                view_colors::init();
+                view_colors::init(true);
                 rescan_files(true);
                 if (!lnav_data.ld_active_files.fc_name_to_errors.empty()) {
                     for (const auto& pair :

src/view_curses.cc

@@ -520,10 +520,10 @@ static color_listener _COLOR_LISTENER;
 term_color_palette* view_colors::vc_active_palette;
 
 void
-view_colors::init()
+view_colors::init(bool headless)
 {
     vc_active_palette = ansi_colors();
-    if (has_colors()) {
+    if (!headless && has_colors()) {
         start_color();
 
         if (lnav_config.lc_ui_default_colors) {

src/view_curses.hh

@@ -210,7 +210,7 @@ public:
      * called before this method, but the returned attributes cannot be used
      * with curses code until this method is called.
      */
-    static void init();
+    static void init(bool headless);
 
     void init_roles(const lnav_theme& lt,
                     lnav_config_listener::error_reporter& reporter);

test/drive_mvwattrline.cc

@@ -61,7 +61,7 @@ main(int argc, char* argv[])
 
         curs_set(0);
         noecho();
-        view_colors::singleton().init();
+        view_colors::singleton().init(false);
 
         al.with_string("Plain text");
         view_curses::mvwattrline(win, y++, 0, al, lr);

test/drive_view_colors.cc

@@ -92,7 +92,7 @@ main(int argc, char* argv[])
         }
     }
 
-    view_colors::init();
+    view_colors::init(false);
     curs_set(0);
     tc.tc_window = win;
     tc.do_update();