fix warnings

stepmania/src/ActorCommands.cpp

@@ -19,7 +19,7 @@
 void IncorrectActorParametersWarning( const ParsedCommand &command, int iMaxIndexAccessed )
 {
 	const CString sError = ssprintf( "Actor::HandleCommand: Wrong number of parameters in command '%s'.  Expected %d but there are %u.",
-		command.GetOriginalCommandString().c_str(), iMaxIndexAccessed+1, command.vTokens.size() );
+		command.GetOriginalCommandString().c_str(), iMaxIndexAccessed+1, unsigned(command.vTokens.size()) );
 	LOG->Warn( sError );
 	HOOKS->MessageBoxOK( sError );
 }

stepmania/src/ConditionalBGA.cpp

@@ -527,7 +527,8 @@ void ConditionalBGA::CheckBgaRequirements(BgaCondInfo info)
 			else // we have to check the history of grades to ensure they met the spec asked
 			{
 				LOG->Info("Checking Grade History");
-				LOG->Info("Stage Stats Size: %d NumConditionalGrades: %d",g_vPlayedStageStats.size(),info.grades.size());
+				LOG->Info("Stage Stats Size: %u NumConditionalGrades: %u",
+                          unsigned(g_vPlayedStageStats.size()), unsigned(info.grades.size()));
 				bool foundavalidgradeforstage = false;
 				for(unsigned d=info.grades.size()-1,g=g_vPlayedStageStats.size()-1;d>0;d--,g--)
 				{

stepmania/src/LuaHelpers.cpp

@@ -97,7 +97,7 @@ void LoadFromString( lua_State *L, const CString &str )
 static jmp_buf jbuf;
 static CString jbuf_error;
 
-int LuaPanic( lua_State *L )
+static int LuaPanic( lua_State *L )
 {
 	CString err;
 	Lua::PopStack( L, err );
@@ -107,6 +107,7 @@ int LuaPanic( lua_State *L )
 	 * an exception from there. */
 	jbuf_error = err;
 	longjmp( jbuf, 1 );
+    return 0; // control never reaches here but quiets warning
 }
 
 bool Lua::RunExpression( const CString &str )