Added ImGuiIO::ClearInputCharacters() superfluous helper.

imgui.h

@@ -734,8 +734,9 @@ struct ImGuiIO
     ImWchar     InputCharacters[16+1];      // List of characters input (translated by user from keypress+keyboard state). Fill using AddInputCharacter() helper.
 
     // Functions
-    IMGUI_API void AddInputCharacter(ImWchar c);                    // Helper to add a new character into InputCharacters[]
-    IMGUI_API void AddInputCharactersUTF8(const char* utf8_chars);  // Helper to add new characters into InputCharacters[] from an UTF-8 string
+    IMGUI_API void AddInputCharacter(ImWchar c);                        // Helper to add a new character into InputCharacters[]
+    IMGUI_API void AddInputCharactersUTF8(const char* utf8_chars);      // Helper to add new characters into InputCharacters[] from an UTF-8 string
+    IMGUI_API void ClearInputCharacters() { InputCharacters[0] = 0; }   // Helper to clear the text input buffer
 
     //------------------------------------------------------------------
     // Output - Retrieve after calling NewFrame(), you can use them to discard inputs or hide them from the rest of your application