Merge branch 'constexpr' into 'master'

Sprinkle a couple of constexpr found by VS

See merge request OpenMW/openmw!800

(cherry picked from commit 5e8ea624bc85acebf457592dd10b790124ecf6ef)

5704b2ac Sprinkle a couple of constexpr found by VS

components/esm/loadland.cpp

@@ -161,9 +161,9 @@ namespace ESM
             {
                 // Generate WNAM record
                 signed char wnam[LAND_GLOBAL_MAP_LOD_SIZE];
-                float max = std::numeric_limits<signed char>::max();
-                float min = std::numeric_limits<signed char>::min();
-                float vertMult = static_cast<float>(ESM::Land::LAND_SIZE - 1) / LAND_GLOBAL_MAP_LOD_SIZE_SQRT;
+                constexpr float max = std::numeric_limits<signed char>::max();
+                constexpr float min = std::numeric_limits<signed char>::min();
+                constexpr float vertMult = static_cast<float>(ESM::Land::LAND_SIZE - 1) / LAND_GLOBAL_MAP_LOD_SIZE_SQRT;
                 for (int row = 0; row < LAND_GLOBAL_MAP_LOD_SIZE_SQRT; ++row)
                 {
                     for (int col = 0; col < LAND_GLOBAL_MAP_LOD_SIZE_SQRT; ++col)

components/terrain/quadtreeworld.cpp

@@ -212,8 +212,8 @@ public:
         {
             // We arrived at a leaf.
             // Since the tree is used for LOD level selection instead of culling, we do not need to load the actual height data here.
-            float minZ = -std::numeric_limits<float>::max();
-            float maxZ = std::numeric_limits<float>::max();
+            constexpr float minZ = -std::numeric_limits<float>::max();
+            constexpr float maxZ = std::numeric_limits<float>::max();
             float cellWorldSize = mStorage->getCellWorldSize();
             osg::BoundingBox boundingBox(osg::Vec3f((center.x()-halfSize)*cellWorldSize, (center.y()-halfSize)*cellWorldSize, minZ),
                                     osg::Vec3f((center.x()+halfSize)*cellWorldSize, (center.y()+halfSize)*cellWorldSize, maxZ));