Crash during configure without development SSL libraries installed

Incorrect usage of OPENSSL_INCLUDE_DIR variable within cmake caused the
configure step to fail. The variable was used before being checked if
the include directory actually existed.

cmake/ssl.cmake

@@ -156,6 +156,10 @@ MACRO (MYSQL_CHECK_SSL)
       LIST(REVERSE CMAKE_FIND_LIBRARY_SUFFIXES)
     ENDIF()
 
+    IF(OPENSSL_INCLUDE_DIR AND
+       OPENSSL_LIBRARIES   AND
+       CRYPTO_LIBRARY
+      )
       # Verify version number. Version information looks like:
       #   #define OPENSSL_VERSION_NUMBER 0x1000103fL
       # Encoded as MNNFFPPS: major minor fix patch status
@@ -167,26 +171,22 @@ MACRO (MYSQL_CHECK_SSL)
         "^.*OPENSSL_VERSION_NUMBER[\t ]+0x([0-9]).*$" "\\1"
         OPENSSL_MAJOR_VERSION "${OPENSSL_VERSION_NUMBER}"
       )
-
-    IF(OPENSSL_INCLUDE_DIR AND
-       OPENSSL_LIBRARIES   AND
-       CRYPTO_LIBRARY
-      )
+      INCLUDE(CheckSymbolExists)
+      SET(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+      CHECK_SYMBOL_EXISTS(SHA512_DIGEST_LENGTH "openssl/sha.h"
+                          HAVE_SHA512_DIGEST_LENGTH)
       SET(OPENSSL_FOUND TRUE)
     ELSE()
       SET(OPENSSL_FOUND FALSE)
     ENDIF()
 
+    IF(OPENSSL_FOUND AND HAVE_SHA512_DIGEST_LENGTH)
       MESSAGE(STATUS "OPENSSL_INCLUDE_DIR = ${OPENSSL_INCLUDE_DIR}")
       MESSAGE(STATUS "OPENSSL_LIBRARIES = ${OPENSSL_LIBRARIES}")
       MESSAGE(STATUS "CRYPTO_LIBRARY = ${CRYPTO_LIBRARY}")
       MESSAGE(STATUS "OPENSSL_MAJOR_VERSION = ${OPENSSL_MAJOR_VERSION}")
 
-    INCLUDE(CheckSymbolExists)
-    SET(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
-    CHECK_SYMBOL_EXISTS(SHA512_DIGEST_LENGTH "openssl/sha.h" 
-                        HAVE_SHA512_DIGEST_LENGTH)
-    IF(OPENSSL_FOUND AND HAVE_SHA512_DIGEST_LENGTH)
+
       SET(SSL_SOURCES "")
       SET(SSL_LIBRARIES ${OPENSSL_LIBRARIES} ${CRYPTO_LIBRARY})
       IF(CMAKE_SYSTEM_NAME MATCHES "SunOS")