Streamline initialization and splash screen code

Should be much less chance of beachballs on OSX

src/tools/soundtool.cpp

@@ -38,7 +38,7 @@ std::unordered_map<int,int> sound_delay = {
 };
 short store_last_sound_played;
 
-static bool sound_going(snd_num_t which_s) {
+bool sound_going(snd_num_t which_s) {
 	short i;
 	
 	for(i = 0; i < 4; i++)

src/tools/soundtool.hpp

@@ -15,6 +15,7 @@ const int NUM_SOUNDS = 100;
 
 typedef unsigned short snd_num_t;
 void init_snd_tool();
+bool sound_going(snd_num_t which_s);
 void play_sound(short which, short how_many_times = 1);
 void one_sound(short which);