Resolved a couple bool/int comparision compiler warnings. Fixed Qt GUI crash when setting 4 score settings without a ROM loaded.

src/drivers/Qt/GamePadConf.cpp

@@ -1000,7 +1000,7 @@ void GamePadConfDialog_t::updatePeriodic(void)
 		}
 	}
 
-	int fourScore;
+	bool fourScore = false;
 	g_config->getOption("SDL.FourScore", &fourScore);
 	if (fourScore != efs_chkbox->isChecked())
 	{

src/drivers/Qt/InputConf.cpp

@@ -557,7 +557,7 @@ void InputConfDialog_t::updatePeriodic(void)
 {
 	bool updateNeeded = false;
 	int tmpCurInputType[3], tmpUsrInputType[3];
-	int fourScoreValue;
+	bool fourScoreValue = false;
 
 	for (int i = 0; i < 3; i++)
 	{

src/drivers/common/configSys.cpp

@@ -447,6 +447,23 @@ Config::getOption(const std::string &name,
     return 0;
 }
 
+int
+Config::getOption(const std::string &name,
+                  bool *value) const
+{
+    std::map<std::string, int>::const_iterator opt_i;
+
+    // confirm that the option exists
+    opt_i = _intOptMap.find(name);
+    if(opt_i == _intOptMap.end()) {
+        return -1;
+    }
+
+    // get the option
+    (*value) = opt_i->second ? true : false;
+    return 0;
+}
+
 int
 Config::getOption(const std::string &name,
                   double *value) const

src/drivers/common/configSys.h

@@ -69,6 +69,7 @@ public:
     int getOption(const std::string &, std::string *) const;
     int getOption(const std::string &, const char **) const;
     int getOption(const std::string &, int *) const;
+    int getOption(const std::string &, bool *) const;
     int getOption(const std::string &, double *) const;
 
     /**

src/input.cpp

@@ -486,11 +486,18 @@ static void SetInputStuff(int port)
 	switch(joyports[port].type)
 	{
 	case SI_GAMEPAD:
-		if(GameInfo->type==GIT_VSUNI){
+		if (GameInfo)
+		{
+			if (GameInfo->type==GIT_VSUNI){
 				joyports[port].driver = &GPCVS;
 			} else {
 				joyports[port].driver= &GPC;
 			}
+		}
+		else
+		{
+			joyports[port].driver= &GPC;
+		}
 		break;
 	case SI_SNES:
 		joyports[port].driver= &GPSNES;