chore: enable more SDL flags (#51)

Author: rzhao271

binding.gyp

@@ -23,13 +23,14 @@
         "VCCLCompilerTool": {
           "AdditionalOptions": [
             "/guard:cf",
-            "/w34244",
-            "/we4267",
+            "/sdl",
+            "/W3",
             "/ZH:SHA_256"
           ]
         },
         "VCLinkerTool": {
           "AdditionalOptions": [
+            "/DYNAMICBASE",
             "/guard:cf"
           ]
         }

src/statement.h

@@ -52,7 +52,9 @@ namespace Values {
         template <class T> inline Blob(T _name, size_t len, const void* val) :
                 Field(_name, SQLITE_BLOB), length(len) {
             value = (char*)malloc(len);
-            memcpy(value, val, len);
+            if (value) {
+                memcpy(value, val, len);
+            }
         }
         inline ~Blob() {
             free(value);