Tables: fixed assertion related to inconsistent outer clipping when sizes are not rounded. (#7957)

docs/CHANGELOG.txt

@@ -70,7 +70,8 @@ Other changes:
   (e.g. in our testing, handling of a 1 MB text buffer is now 3 times faster in VS2022 Debug build).
   This is the first step toward more refactoring. (#7925) [@alektron, @ocornut]
 - InputText: added CJK double-width punctuation to list of separators considered for CTRL+Arrow.
-- Tables: fixes an assertion with tables with borders when clipped by parent. (#6765, #3752, #7428)
+- Tables: fixed assertion related to inconsistent outer clipping when sizes are not rounded. (#7957) [@eclbtownsend]
+- Tables: fixed assertion with tables with borders when clipped by parent. (#6765, #3752, #7428)
 - Misc: Made it accepted to call SetMouseCursor() with any out-of-bound value, as a way to allow
   hacking in custom cursors if desirable.
 - Fonts: fixed ellipsis "..." rendering width miscalculation bug introduced in 1.91.0. (#7976) [@DDeimos]

imgui.h

@@ -29,7 +29,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.91.2 WIP"
-#define IMGUI_VERSION_NUM   19114
+#define IMGUI_VERSION_NUM   19115
 #define IMGUI_HAS_TABLE
 
 /*

imgui_tables.cpp

@@ -328,7 +328,7 @@ bool    ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
     // - always performing the GetOrAddByKey() O(log N) query in g.Tables.Map[].
     const bool use_child_window = (flags & (ImGuiTableFlags_ScrollX | ImGuiTableFlags_ScrollY)) != 0;
     const ImVec2 avail_size = GetContentRegionAvail();
-    const ImVec2 actual_outer_size = CalcItemSize(outer_size, ImMax(avail_size.x, 1.0f), use_child_window ? ImMax(avail_size.y, 1.0f) : 0.0f);
+    const ImVec2 actual_outer_size = ImTrunc(CalcItemSize(outer_size, ImMax(avail_size.x, 1.0f), use_child_window ? ImMax(avail_size.y, 1.0f) : 0.0f));
     const ImRect outer_rect(outer_window->DC.CursorPos, outer_window->DC.CursorPos + actual_outer_size);
     const bool outer_window_is_measuring_size = (outer_window->AutoFitFramesX > 0) || (outer_window->AutoFitFramesY > 0); // Doesn't apply to AlwaysAutoResize windows!
     if (use_child_window && IsClippedEx(outer_rect, 0) && !outer_window_is_measuring_size)