A few fixes to make it compile under windows again

luprex/core/cpp/driver-mingw.cpp

@@ -41,7 +41,7 @@ static void set_nonblocking(SOCKET sock) {
 }
 
 static std::string winsock_error_string(int errcode) {
-    drv::ostringstream oss;
+    std::ostringstream oss;
     oss << "error " << errcode;
     return oss.str();
 }
@@ -51,7 +51,7 @@ static PADDRINFOA find_good_addr(PADDRINFOA addrinfo) {
         if (addr->ai_family == AF_INET) {
             return addr;
         }
-    }std::string
+    }
     return nullptr;
 }
 
@@ -59,10 +59,10 @@ static SOCKET open_connection(std::string_view target, std::string &err) {
     PADDRINFOA addrs = nullptr;
     PADDRINFOA goodaddr = nullptr;
     SOCKET sock = INVALID_SOCKET;
-    std::string_view host, port;
+    std::string host, port;
     
     err.clear();
-    util::split_host_port(target, host, port);
+    drv::split_host_port(target, host, port);
     int status = getaddrinfo(host.data(), port.data(), nullptr, &addrs);
     while (status == WSATRY_AGAIN) {
         status = getaddrinfo(host.data(), port.data(), nullptr, &addrs);

luprex/core/cpp/eng-malloc.hpp

@@ -56,7 +56,7 @@ void* realloc(void*, size_t);
 int   memhash();
 #else
 inline void *malloc(size_t x) { return ::malloc(x); }
-inline void  free(void *p) { return ::free(x); }
+inline void  free(void *p) { return ::free(p); }
 inline void *realloc(void *p, size_t x) { return ::realloc(p, x); }
 inline int   memhash() { return 0; }
 #endif

luprex/core/cpp/printbuffer.cpp

@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <cstdio>
+#include <cinttypes>
 
 struct PrintBufferCore  : public eng::opnew {
     // The most recent lines printed.
@@ -190,7 +191,7 @@ bool PrintChanneler::channel(const PrintBuffer *printbuffer, std::ostream &ostre
 
 Invocation PrintChanneler::invocation(int64_t actor_id) {
     char buf[80];
-    sprintf(buf, "%ld", line_);
+    sprintf(buf, PRId64, line_);
     return Invocation(Invocation::KIND_FLUSH_PRINTS, actor_id, actor_id, buf, InvocationData());
 }