Fixed a compiler error when enabling CLIPPER2_HI_PRECISION.

Author: AngusJohnson

CPP/Clipper2Lib/include/clipper2/clipper.core.h

@@ -1,6 +1,6 @@
 /*******************************************************************************
 * Author    :  Angus Johnson                                                   *
-* Date      :  13 December 2023                                                *
+* Date      :  22 December 2023                                                *
 * Website   :  http://www.angusj.com                                           *
 * Copyright :  Angus Johnson 2010-2023                                         *
 * Purpose   :  Core Clipper Library structures and functions                   *
@@ -754,21 +754,32 @@ namespace Clipper2Lib
     T bb1miny = CC_MIN(ln2a.y, ln2b.y);
     T bb1maxx = CC_MAX(ln2a.x, ln2b.x);
     T bb1maxy = CC_MAX(ln2a.y, ln2b.y);
-    T originx = (CC_MIN(bb0maxx, bb1maxx) + CC_MAX(bb0minx, bb1minx)) >> 1;
-    T originy = (CC_MIN(bb0maxy, bb1maxy) + CC_MAX(bb0miny, bb1miny)) >> 1;
-    double ln0c = (ln1dy * static_cast<double>(ln1a.x - originx)) +
-      (ln1dx * static_cast<double>(ln1a.y - originy));
-    double ln1c = (ln2dy * static_cast<double>(ln2a.x - originx)) +
-      (ln2dx * static_cast<double>(ln2a.y - originy));
-    double hitx = ((ln1dx * ln1c) - (ln2dx * ln0c)) / det;
-    double hity = ((ln2dy * ln0c) - (ln1dy * ln1c)) / det;
+
     if constexpr (std::numeric_limits<T>::is_integer)
     {
+      int64_t originx = (CC_MIN(bb0maxx, bb1maxx) + CC_MAX(bb0minx, bb1minx)) >> 1;
+      int64_t originy = (CC_MIN(bb0maxy, bb1maxy) + CC_MAX(bb0miny, bb1miny)) >> 1;
+      double ln0c = (ln1dy * static_cast<double>(ln1a.x - originx)) +
+        (ln1dx * static_cast<double>(ln1a.y - originy));
+      double ln1c = (ln2dy * static_cast<double>(ln2a.x - originx)) +
+        (ln2dx * static_cast<double>(ln2a.y - originy));
+      double hitx = ((ln1dx * ln1c) - (ln2dx * ln0c)) / det;
+      double hity = ((ln2dy * ln0c) - (ln1dy * ln1c)) / det;
+
       ip.x = originx + (T)nearbyint(hitx);
       ip.y = originy + (T)nearbyint(hity);
     }
     else
     {
+      double originx = (CC_MIN(bb0maxx, bb1maxx) + CC_MAX(bb0minx, bb1minx)) / 2.0;
+      double originy = (CC_MIN(bb0maxy, bb1maxy) + CC_MAX(bb0miny, bb1miny)) / 2.0;
+      double ln0c = (ln1dy * static_cast<double>(ln1a.x - originx)) +
+        (ln1dx * static_cast<double>(ln1a.y - originy));
+      double ln1c = (ln2dy * static_cast<double>(ln2a.x - originx)) +
+        (ln2dx * static_cast<double>(ln2a.y - originy));
+      double hitx = ((ln1dx * ln1c) - (ln2dx * ln0c)) / det;
+      double hity = ((ln2dy * ln0c) - (ln1dy * ln1c)) / det;
+
       ip.x = originx + static_cast<T>(hitx);
       ip.y = originy + static_cast<T>(hity);
     }