Signal handling for sparc is broken, fix it.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

--- dante-1.4.1.orig/lib/tostring.c	2014-08-21 18:21:50.000000000 +0200
+++ dante-1.4.1/lib/tostring.c	2016-07-10 10:08:39.785662622 +0200
@@ -1526,7 +1526,7 @@ signal2string(sig)
          return "SIGKILL";
 #endif /* SIGKILL */
 
-#if (defined SIGLOST) && (!defined SIGABRT || SIGLOST != SIGABRT)
+#if (defined SIGLOST) && (!defined SIGABRT || SIGLOST != SIGABRT || SIGLOST != SIGPWR)
       case SIGLOST:
          return "SIGLOST";
 #endif /* SIGLOST */
@@ -1551,7 +1551,7 @@ signal2string(sig)
          return "SIGPROF";
 #endif /* SIGPROF */
 
-#ifdef SIGPWR
+#if (defined SIGPWR) && SIGPWR != SIGLOST
       case SIGPWR:
          return "SIGPWR";
 #endif /* SIGPWR */