Merge pull request libgit2#5632 from csware/winhttp_typo

Fix typo: Make ifndef macroname the same as the define name

Author: pks-t

src/transports/winhttp.c

@@ -41,11 +41,11 @@
 #define WINHTTP_IGNORE_REQUEST_TOTAL_LENGTH 0
 #endif
 
-#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS_1_1
+#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1
 # define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 0x00000200
 #endif
 
-#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS_1_2
+#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2
 # define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2 0x00000800
 #endif