Add a netdev provider "none" as a fallback doing nothing.

src/osd/modules/lib/osdobj_common.c

@@ -130,6 +130,7 @@ void osd_common_t::register_options()
 
 	REGISTER_MODULE(m_mod_man, NETDEV_TAPTUN);
 	REGISTER_MODULE(m_mod_man, NETDEV_PCAP);
+	REGISTER_MODULE(m_mod_man, NETDEV_NONE);
 
 	REGISTER_MODULE(m_mod_man, MIDI_PM);
 	REGISTER_MODULE(m_mod_man, MIDI_NONE);

src/osd/modules/netdev/none.c

@@ -0,0 +1,18 @@
+/*
+ * none.c
+ *
+ */
+
+#include "netdev_module.h"
+#include "modules/osdmodule.h"
+
+class netdev_none : public osd_module, public netdev_module
+{
+public:
+	netdev_none()
+	: osd_module(OSD_NETDEV_PROVIDER, "none"), netdev_module()
+	{
+	}
+};
+
+MODULE_DEFINITION(NETDEV_NONE, netdev_none)

src/osd/sdl/sdl.mak

@@ -81,7 +81,6 @@ SDL_FRAMEWORK_PATH = /Library/Frameworks/
 # SDL_LIBVER = sdl
 
 # uncomment to use BGFX
-
 # USE_BGFX = 1
 
 ###########################################################################
@@ -344,8 +343,8 @@ SDL_NETWORK = pcap
 INCPATH += -I$(3RDPARTY)/winpcap/Include
 
 # enable UNICODE
-DEFS += -Dmain=utf8_main -DUNICODE -D_UNICODE
-LDFLAGS += -municode
+DEFS += -Dmain=utf8_main -DUNICODE -D_UNICODE 
+LDFLAGS += -municode 
 
 # Qt
 ifndef NO_USE_QTDEBUG
@@ -451,6 +450,7 @@ OSDOBJS = \
 	$(OSDOBJ)/modules/font/font_none.o \
 	$(OSDOBJ)/modules/netdev/taptun.o \
 	$(OSDOBJ)/modules/netdev/pcap.o \
+	$(OSDOBJ)/modules/netdev/none.o \
 	$(OSDOBJ)/modules/midi/portmidi.o \
 	$(OSDOBJ)/modules/midi/none.o \
 

src/osd/windows/windows.mak

@@ -392,6 +392,7 @@ OSDOBJS = \
 	$(OSDOBJ)/modules/font/font_none.o \
 	$(OSDOBJ)/modules/netdev/pcap.o \
 	$(OSDOBJ)/modules/netdev/taptun.o \
+	$(OSDOBJ)/modules/netdev/none.o \
 
 ifdef USE_SDL
 DEFS += -DUSE_SDL_SOUND