patch 7.4.1781

Problem:    synIDattr() does not respect 'guicolors'.
Solution:   Change the conditition for the mode. (Christian Brabandt)

src/eval.c

@@ -20019,8 +20019,8 @@ f_synIDattr(typval_T *argvars UNUSED, typval_T *rettv)
     }
     else
     {
-#ifdef FEAT_GUI
-	if (gui.in_use)
+#if defined(FEAT_GUI) || defined(FEAT_TERMTRUECOLOR)
+	if (USE_24BIT)
 	    modec = 'g';
 	else
 #endif

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1781,
 /**/
     1780,
 /**/