patch 7.4.727
Problem:    Cannot build GvimExt with MingW.
Solution:   Add -lgdi32.  (KF Leong)
diff --git a/src/GvimExt/Make_ming.mak b/src/GvimExt/Make_ming.mak
index 9c383b0..d1d060b 100644
--- a/src/GvimExt/Make_ming.mak
+++ b/src/GvimExt/Make_ming.mak
@@ -47,7 +47,7 @@
 WINDRES := $(CROSS_COMPILE)windres
 WINDRES_CXX = $(CXX)
 WINDRES_FLAGS = --preprocessor="$(WINDRES_CXX) -E -xc" -DRC_INVOKED
-LIBS :=  -luuid
+LIBS :=  -luuid -lgdi32
 RES  := gvimext.res
 DEFFILE = gvimext_ming.def
 OBJ  := gvimext.o