Fix plugin-wine build when Linux side has no X11

Signed-off-by: falkTX <falktx@falktx.com>

source/Makefile.mk

@@ -175,10 +175,7 @@ BASE_FLAGS += -DHAVE_DGL
 BASE_FLAGS += -DHAVE_OPENGL
 BASE_FLAGS += -DDGL_OPENGL
 BASE_FLAGS += -DDONT_SET_USING_DGL_NAMESPACE
-ifneq ($(USING_CUSTOM_DPF),true)
-BASE_FLAGS += -DDGL_FILE_BROWSER_DISABLED
-BASE_FLAGS += -DDGL_NO_SHARED_RESOURCES
-else
+ifeq ($(USING_CUSTOM_DPF),true)
 BASE_FLAGS += -DDISTRHO_UI_FILE_BROWSER=0
 endif
 ifneq ($(DGL_NAMESPACE),)
@@ -188,6 +185,11 @@ BASE_FLAGS += -DDGL_NAMESPACE=CarlaDGL
 endif
 endif
 
+ifneq ($(USING_CUSTOM_DPF),true)
+BASE_FLAGS += -DDGL_FILE_BROWSER_DISABLED
+BASE_FLAGS += -DDGL_NO_SHARED_RESOURCES
+endif
+
 ifeq ($(HAVE_FLUIDSYNTH),true)
 BASE_FLAGS += -DHAVE_FLUIDSYNTH
 ifeq ($(HAVE_FLUIDSYNTH_INSTPATCH),true)