PR libstdc++/91057 fix bootstrap failure on powerpc

	PR libstdc++/91057
	* src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
	(find_ldbl_sync_facet): Fix parameter type and missing return.

From-SVN: r276840

libstdc++-v3/ChangeLog

+2019-10-10  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/91057
+	* src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
+	(find_ldbl_sync_facet): Fix parameter type and missing return.
+
 2019-10-09  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/91364 - P0388R4: Permit conversions to arrays of	unknown bound.

libstdc++-v3/src/c++98/locale.cc

@@ -478,7 +478,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #ifdef _GLIBCXX_LONG_DOUBLE_COMPAT
 namespace {
   inline locale::id*
-  find_ldbl_sync_facet(locale::id* __idp)
+  find_ldbl_sync_facet(const locale::id* __idp)
   {
 # define _GLIBCXX_SYNC_ID(facet, mangled) \
     if (__idp == &::mangled)		  \
@@ -494,6 +494,7 @@ namespace {
     _GLIBCXX_SYNC_ID (money_get<wchar_t>, _ZNSt9money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE);
     _GLIBCXX_SYNC_ID (money_put<wchar_t>, _ZNSt9money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE);
 # endif
+    return 0;
   }
 } // namespace
 #endif