Typesafe strprintf/error/LogPrint functions

Switch to tinyformat-based formatting.

Tinyformat is a typesafe drop-in replacement for C99 printf functions:
https://github.com/c42f/tinyformat

Author: laanwj

configure.ac

@@ -189,7 +189,7 @@ case $host in
        AC_MSG_ERROR("windres not found")
      fi
 
-     CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -D__USE_MINGW_ANSI_STDIO"
+     CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB"
      LEVELDB_TARGET_FLAGS="TARGET_OS=OS_WINDOWS_CROSSCOMPILE"
      if test "x$CXXFLAGS_overridden" = "xno"; then
        CXXFLAGS="$CXXFLAGS -w"

src/Makefile.am

@@ -60,6 +60,7 @@ BITCOIN_CORE_H = \
   serialize.h \
   sync.h \
   threadsafety.h \
+  tinyformat.h \
   txdb.h \
   txmempool.h \
   ui_interface.h \

src/main.cpp

@@ -1884,7 +1884,7 @@ bool SetBestChain(CValidationState &state, CBlockIndex* pindexNew)
             pindex = pindex->pprev;
         }
         if (nUpgraded > 0)
-            LogPrintf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, CBlock::CURRENT_VERSION);
+            LogPrintf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, (int)CBlock::CURRENT_VERSION);
         if (nUpgraded > 100/2)
             // strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
             strMiscWarning = _("Warning: This version is obsolete, upgrade required!");