winbuild: Don't USE_WINSSL when WITH_SSL is being used

Regression of commit d39bbcfa8d when compiling against OpenSSL.

winbuild/Makefile.vc

@@ -95,7 +95,11 @@ USE_SPNEGO = false
 !ENDIF
 
 !IFNDEF ENABLE_WINSSL
+!IFDEF WITH_SSL
+USE_WINSSL = false
+!ELSE
 USE_WINSSL = $(USE_SSPI)
+!ENDIF
 !ELSEIF "$(ENABLE_WINSSL)"=="yes"
 USE_WINSSL = true
 !ELSEIF "$(ENABLE_WINSSL)"=="no"