iidx,sdvx: detect SuperstepSound init failures and log a message upon crash (#376)

## Link to GitHub Issue, if one exists
#345 

## Description of change
If we see SuperstepSound failure during boot, remember it, and when the
game eventually crashes, log a series of warning messages to surface why
the game likely failed to launch.

## Testing
Tested both iidx and sdvx with an audio device set to not allow
exclusive mode.

src/spice2x/launcher/signal.cpp

@@ -29,6 +29,9 @@ namespace launcher::signal {
     // settings
     bool DISABLE = false;
     bool USE_VEH_WORKAROUND = false;
+
+    // states
+    bool SUPERSTEP_SOUND_ERROR = false;
 }
 
 #define V(variant) case variant: return #variant
@@ -111,6 +114,13 @@ static LONG WINAPI TopLevelExceptionFilter(struct _EXCEPTION_POINTERS *Exception
                 "    RivaTuner Statistics Server (RTSS), MSI Afterburner, kernel mode anti-cheat");
         }
 
+        if (launcher::signal::SUPERSTEP_SOUND_ERROR) {
+            log_warning("signal", "audio initialization error was previously detected during boot!");
+            log_warning("signal", "    (W:SuperstepSound: Audio device is not available!!!)");
+            log_warning("signal", "    this crash is most likely related to audio init failure");
+            log_warning("signal", "    fix your audio device, double check your audio options/patches, and try again");
+        }
+
         // walk the exception chain
         struct _EXCEPTION_RECORD *record_cause = ExceptionRecord->ExceptionRecord;
         while (record_cause != nullptr) {