Add mechanism to disable temporary compiler warnings in a sequence of code.

m-bitset.h

@@ -30,6 +30,8 @@
 
 /********************************** INTERNAL ************************************/
 
+M_BEGIN_PROTECTED_CODE
+
 // Define the basic limb of a bitset
 typedef uint64_t bitset_limb;
 // And its size in bits
@@ -813,4 +815,6 @@ bitset_get_str(string_t str, const bitset_t set, bool append)
   string_push_back (str, ']');
 }
 
+M_END_PROTECTED_CODE
+
 #endif