fix compile error on macOS 10.13 for claimed_address; fix by @michaeljclark, issue #527

Author: daanx

src/alloc-override-osx.c

@@ -217,7 +217,7 @@ static malloc_zone_t mi_malloc_zone = {
   .batch_free = &zone_batch_free,
   .introspect = &mi_introspect,  
 #if defined(MAC_OS_X_VERSION_10_6) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)
-  #if defined(MAC_OS_X_VERSION_10_7) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
+  #if defined(MAC_OS_X_VERSION_10_14) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14)
   .version = 10,
   #else
   .version = 9,
@@ -226,7 +226,7 @@ static malloc_zone_t mi_malloc_zone = {
   .memalign = &zone_memalign,
   .free_definite_size = &zone_free_definite_size,
   .pressure_relief = &zone_pressure_relief,
-  #if defined(MAC_OS_X_VERSION_10_7) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
+  #if defined(MAC_OS_X_VERSION_10_14) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14)
   .claimed_address = &zone_claimed_address,
   #endif
 #else