Add debug break hook for Lua

ryzom/common/data_common/r2/r2_debug.lua

@@ -132,6 +132,11 @@ end
 -- INIT --
 ----------
 
+if debugBreak == nil then
+	-- replace this at runtime with the debugger break functions
+	debugBreak = function()
+	end
+end
 
 -- replace the assert function with a more verbose one
 if oldAssert == nil then
@@ -142,7 +147,8 @@ function assert(cond)
 	if not cond then
 		-- rawDebugInfo(colorTag(255, 0, 255) .. "ASSERTION FAILED !! ")
 		rawDebugInfo("@{FOFF}ASSERTION FAILED !! ")
-		dumpCallStack(2);
+		dumpCallStack(2)
+		debugBreak()
 		error("")
 	end
 end