patch 7.4.2252
Problem:    Compiler warnings for signed/unsigned in expression.
Solution:   Remove type cast. (Dominique Pelle)
diff --git a/src/version.c b/src/version.c
index 3c6d155..4fbbb82 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2252,
+/**/
     2251,
 /**/
     2250,
diff --git a/src/vim.h b/src/vim.h
index 898ebb6..8d49dcd 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1632,14 +1632,14 @@
 #  define GUI_FUNCTION2(f, pixel)   (gui.in_use \
 				    ?  ((pixel) != INVALCOLOR \
 					? gui_##f((pixel)) \
-					: (long_u)INVALCOLOR) \
+					: INVALCOLOR) \
 				    : termgui_##f((pixel)))
 #  define USE_24BIT		    (gui.in_use || p_tgc)
 # else
 #  define GUI_FUNCTION(f)	    gui_##f
 #  define GUI_FUNCTION2(f,pixel)    ((pixel) != INVALCOLOR \
 				     ? gui_##f((pixel)) \
-				     : (long_u)INVALCOLOR)
+				     : INVALCOLOR)
 #  define USE_24BIT		    gui.in_use
 # endif
 #else