start.exe: build_args now returns the correct string when no parameter

is passed.

programs/start/start.c

@@ -109,6 +109,7 @@ static char *build_args( int argc, char **argv )
 	for (i = 0; i < argc; i++ )
 		len += strlen(argv[i]) + 1;
 	ret = HeapAlloc( GetProcessHeap(), 0, len );
+	ret[0] = 0;
 
 	for (i = 0, p = ret; i < argc; i++ )
 		p += sprintf(p, " %s", argv[i]);