Core/Misc: Fix no-pch build

src/server/collision/Maps/MapTree.cpp

@@ -157,7 +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() || !isfinite(maxDist))
+        if (maxDist == std::numeric_limits<float>::max() || !std::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

@@ -31,6 +31,7 @@
 #include <vector>
 #include <cstring>
 #include <time.h>
+#include <math.h>
 
 // Root of ByteBuffer exception hierarchy
 class ByteBufferException : public std::exception
@@ -241,7 +242,7 @@ class ByteBuffer
         ByteBuffer &operator>>(float &value)
         {
             value = read<float>();
-            if (!isfinite(value))
+            if (!std::isfinite(value))
                 throw ByteBufferException();
             return *this;
         }
@@ -249,7 +250,7 @@ class ByteBuffer
         ByteBuffer &operator>>(double &value)
         {
             value = read<double>();
-            if (!isfinite(value))
+            if (!std::isfinite(value))
                 throw ByteBufferException();
             return *this;
         }