Core/Misc: Throw an exception if client sends invalid float/double data

Throw a ByteBufferException if client sends 1.#INF0000, 1.#QNAN000, 1.#IND0000 or other invalid float/double values.
Handle this invalid values in StaticMapTree::isInLineOfSight() to avoid triggering an assert.
Fixes #12126

src/server/collision/Maps/MapTree.cpp

@@ -157,8 +157,7 @@ namespace VMAP
     {
         float maxDist = (pos2 - pos1).magnitude();
         // return false if distance is over max float, in case of cheater teleporting to the end of the universe
-        if (maxDist == std::numeric_limits<float>::max() ||
-            maxDist == std::numeric_limits<float>::infinity())
+        if (maxDist == std::numeric_limits<float>::max() || !isfinite(maxDist))
             return false;
 
         // valid map coords should *never ever* produce float overflow, but this would produce NaNs too

src/server/shared/Packets/ByteBuffer.h

@@ -241,12 +241,16 @@ class ByteBuffer
         ByteBuffer &operator>>(float &value)
         {
             value = read<float>();
+            if (!isfinite(value))
+                throw ByteBufferException();
             return *this;
         }
 
         ByteBuffer &operator>>(double &value)
         {
             value = read<double>();
+            if (!isfinite(value))
+                throw ByteBufferException();
             return *this;
         }