Fix balance diagnostics push-pop for gcc (PR 19 extra, PR #83)

Author: martinmoene

include/lest/lest.hpp

@@ -97,6 +97,8 @@
 #if defined (__clang__)
 # define lest_SUPPRESS_WMISBRACES _Pragma( "clang diagnostic push" ) \
                                   _Pragma( "clang diagnostic ignored \"-Wmissing-braces\"" )
+# define lest_RESTORE_WMISBRACES  _Pragma( "clang diagnostic pop"  )
+
 # define lest_SUPPRESS_WSHADOW    _Pragma( "clang diagnostic push" ) \
                                   _Pragma( "clang diagnostic ignored \"-Wshadow\"" )
 # define lest_SUPPRESS_WUNUSED    _Pragma( "clang diagnostic push" ) \
@@ -105,13 +107,16 @@
 
 #elif defined (__GNUC__)
 # define lest_SUPPRESS_WMISBRACES /*empty*/
+# define lest_RESTORE_WMISBRACES  /*empty*/
+
 # define lest_SUPPRESS_WSHADOW    _Pragma( "GCC diagnostic push" ) \
                                   _Pragma( "GCC diagnostic ignored \"-Wshadow\"" )
 # define lest_SUPPRESS_WUNUSED    _Pragma( "GCC diagnostic push" ) \
                                   _Pragma( "GCC diagnostic ignored \"-Wunused-value\"" )
 # define lest_RESTORE_WARNINGS    _Pragma( "GCC diagnostic pop"  )
 #else
 # define lest_SUPPRESS_WMISBRACES /*empty*/
+# define lest_RESTORE_WMISBRACES  /*empty*/
 # define lest_SUPPRESS_WSHADOW    /*empty*/
 # define lest_SUPPRESS_WUNUSED    /*empty*/
 # define lest_RESTORE_WARNINGS    /*empty*/
@@ -198,12 +203,12 @@
 # define lest_CASE( proposition ) \
     lest_SUPPRESS_WMISBRACES \
     proposition, []( lest::env & lest_env ) \
-    lest_RESTORE_WARNINGS
+    lest_RESTORE_WMISBRACES
 
 # define lest_CASE_ON( proposition, ... ) \
     lest_SUPPRESS_WMISBRACES \
     proposition, [__VA_ARGS__]( lest::env & lest_env ) \
-    lest_RESTORE_WARNINGS
+    lest_RESTORE_WMISBRACES
 
 # define lest_MODULE( specification, module ) \
     namespace { lest::add_module _( specification, module ); }