(svn r16702) -Change: don't implicitly fall back to the null/dedicated (video) drivers, but show an error message that no driver could be found. You can still explicitly start the null drivers thought.

src/driver.cpp

@@ -61,8 +61,8 @@ Driver *DriverFactoryBase::SelectDriver(const char *name, Driver::Type type)
 	if (GetDrivers().size() == 0) return NULL;
 
 	if (StrEmpty(name)) {
-		/* Probe for this driver */
-		for (int priority = 10; priority >= 0; priority--) {
+		/* Probe for this driver, but do not fall back to dedicated/null! */
+		for (int priority = 10; priority > 0; priority--) {
 			Drivers::iterator it = GetDrivers().begin();
 			for (; it != GetDrivers().end(); ++it) {
 				DriverFactoryBase *d = (*it).second;

src/video/null_v.h

@@ -27,7 +27,7 @@ public:
 
 class FVideoDriver_Null: public VideoDriverFactory<FVideoDriver_Null> {
 public:
-	static const int priority = 1;
+	static const int priority = 0;
 	/* virtual */ const char *GetName() { return "null"; }
 	/* virtual */ const char *GetDescription() { return "Null Video Driver"; }
 	/* virtual */ Driver *CreateInstance() { return new VideoDriver_Null(); }