InputText: fixed an issue where using Escape with ImGuiInputTextFlags_EscapeClearsAll. (#8915, #8273)

Regression test: "widgets_inputtext_temp_buffer_2"

docs/CHANGELOG.txt

@@ -59,6 +59,9 @@ Other Changes:
   would not write back the reverted value during the IsItemDeactivatedAfterEdit()
   frame if the provided input buffer doesn't store temporary edits.
   (regression in 1.91.7) (#8915, #8273)
+- InputText: fixed an issue where using Escape with ImGuiInputTextFlags_EscapeClearsAll
+  would not write back the cleared value during the IsItemDeactivatedAfterEdit()
+  frame if the provided input buffer doesn't store temporary edits. (#8915, #8273)
 - InputText: allow passing an empty string with buf_size==0. (#8907)
   In theory the buffer size should always account for a zero-terminator, but idioms
   such as using InputTextMultiline() with ImGuiInputTextFlags_ReadOnly to display

imgui_widgets.cpp

@@ -4966,7 +4966,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         {
             if (flags & ImGuiInputTextFlags_EscapeClearsAll)
             {
-                if (buf[0] != 0)
+                if (state->TextA.Data[0] != 0)
                 {
                     revert_edit = true;
                 }
@@ -5058,7 +5058,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
             if (flags & ImGuiInputTextFlags_EscapeClearsAll)
             {
                 // Clear input
-                IM_ASSERT(buf[0] != 0); // FIXME: use TextA here?
+                IM_ASSERT(state->TextA.Data[0] != 0);
                 apply_new_text = "";
                 apply_new_text_length = 0;
                 value_changed = true;