Fix incorrect argument order in calls to xrDebug::error/backend.

src/xrCore/xrDebugNew.cpp

@@ -74,6 +74,8 @@ void LogStackTrace(LPCSTR header)
 
 void xrDebug::gather_info(const char* expression, const char* description, const char* argument0, const char* argument1, const char* file, int line, const char* function, LPSTR assertion_info, u32 const assertion_info_size)
 {
+    if (!expression)
+        expression = "<no expression>";
     LPSTR buffer_base = assertion_info;
     LPSTR buffer = assertion_info;
     int assertion_size = (int)assertion_info_size;
@@ -273,17 +275,17 @@ LPCSTR xrDebug::error2string(long code)
 
 void xrDebug::error(long hr, const char* expr, const char* file, int line, const char* function, bool& ignore_always)
 {
-    backend(error2string(hr), expr, 0, 0, file, line, function, ignore_always);
+    backend(expr, error2string(hr), 0, 0, file, line, function, ignore_always);
 }
 
 void xrDebug::error(long hr, const char* expr, const char* e2, const char* file, int line, const char* function, bool& ignore_always)
 {
-    backend(error2string(hr), expr, e2, 0, file, line, function, ignore_always);
+    backend(expr, error2string(hr), e2, 0, file, line, function, ignore_always);
 }
 
 void xrDebug::fail(const char* e1, const char* file, int line, const char* function, bool& ignore_always)
 {
-    backend("assertion failed", e1, 0, 0, file, line, function, ignore_always);
+    backend(e1, "assertion failed", 0, 0, file, line, function, ignore_always);
 }
 
 void xrDebug::fail(const char* e1, const std::string& e2, const char* file, int line, const char* function, bool& ignore_always)
@@ -317,7 +319,7 @@ void __cdecl xrDebug::fatal(const char* file, int line, const char* function, co
 
     bool ignore_always = true;
 
-    backend("fatal error", "<no expression>", buffer, 0, file, line, function, ignore_always);
+    backend(nullptr, "fatal error", buffer, 0, file, line, function, ignore_always);
 }
 
 typedef void(*full_memory_stats_callback_type) ();
@@ -728,9 +730,8 @@ void _terminate ()
 
     string4096 assertion_info;
 
-    Debug.gather_info (
-        //gather_info (
-        "<no expression>",
+    Debug.gather_info(
+        nullptr,
         "Unexpected application termination",
         0,
         0,
@@ -769,7 +770,7 @@ static void handler_base(LPCSTR reason_string)
 {
     bool ignore_always = false;
     Debug.backend(
-        "error handler is invoked!",
+        nullptr,
         reason_string,
         0,
         0,
@@ -830,8 +831,8 @@ static void invalid_parameter_handler(
     }
 
     Debug.backend(
-        "error handler is invoked!",
         expression_,
+        "invalid parameter",
         0,
         0,
         file_,