Add back size_type typedef

Lacking this seems to cause interesting issues with Apple Clang on
32-bit ARM. It seems like it implicitly defines a size_type that
is the same size as size_t, but not actually size_t, so we get an
unsigned long vs unsigned int mismatch on the type.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib/base/secmem.h b/src/lib/base/secmem.h
index 04a67933f..eddf37c71 100644
--- a/src/lib/base/secmem.h
+++ b/src/lib/base/secmem.h
@@ -37,6 +37,7 @@ class secure_allocator
 #endif
 
       typedef T          value_type;
+      typedef std::size_t size_type;
 
 #ifdef BOTAN_BUILD_COMPILER_IS_MSVC_2013
       secure_allocator() = default;