Merge pull request #96 from fancycode/missing_config_h

Include "config.h" to get "inline" on Windows.
diff --git a/crypto/include/sha1.h b/crypto/include/sha1.h
index 9b6cfed..f1744ce 100644
--- a/crypto/include/sha1.h
+++ b/crypto/include/sha1.h
@@ -47,6 +47,10 @@
 #ifndef SHA1_H
 #define SHA1_H
 
+#ifdef HAVE_CONFIG_H
+    #include <config.h>
+#endif
+
 #include "err.h"
 #ifdef OPENSSL
 #include <openssl/evp.h>