Remove execinfo dependency and old crash_print handler (#84)

* Use execinfo/backtrace lookup from YQ2

* Remove crash_print() and associated stuff

rott/dosutil.c

@@ -162,46 +162,3 @@ void DisplayTextSplash(byte *text, int l)
 
 	printf ("\033[m");
 }
-
-#if !defined(__CYGWIN__) && !defined(__MINGW32__) && !defined(__HAIKU__) && !defined(_MSC_VER)
-#include <execinfo.h>
-
-void print_stack (int level)
-{
-	void *array[64];
-	char **syms;
-	int size, i;
-
-	printf ("Stack dump:\n");
-	printf ("{\n");
-	size = backtrace (array, (sizeof (array))/(sizeof (array[0])));
-	syms = backtrace_symbols (array, size);
-	for (i=level+1; i<size;++i) {
-		printf ("\t%s\n",syms[i]);
-	}
-	free (syms);
-	/*
-	for (i = 2; i <size; ++i) {
-		printf ("\t%p\n", array[i]);
-	}
-	*/
-	printf ("}\n");
-}
-#else
-
-void print_stack (int level)
-{
-        printf("Stack dump not implemented.\n");
-}
-
-#endif
-
-void crash_print (int sig)
-{
-	printf ("OH NO OH NO ROTT CRASHED!\n");
-	printf ("Here is where:\n");
-	print_stack (1);
-	SDL_Quit ();
-	exit (1);
-}
-

rott/rt_main.c

@@ -132,8 +132,6 @@ void Init_Tables (void);
 void CheckRemoteRidicule ( int scancode );
 void SetRottScreenRes (int Width, int Height);
 
-extern void crash_print (int);
-
 //extern int G_argc;
 //extern char G_argv[30][80];
 int G_weaponscale;
@@ -155,8 +153,6 @@ int main (int argc, char *argv[])
 	_argc = argc;
 	_argv = argv;
 
-   signal (11, crash_print);
-
    ApogeePath = GetPrefDir();
 
    // Set which release version we're on