diff -ruN Coin3D-coin-8d1ca1a6ea23/src/3ds/SoStream.cpp my/src/3ds/SoStream.cpp
--- Coin3D-coin-8d1ca1a6ea23/src/3ds/SoStream.cpp	2018-04-16 23:14:36.000000000 +0200
+++ my/src/3ds/SoStream.cpp	2018-05-06 06:56:42.104728484 +0200
@@ -185,7 +185,7 @@
   if (!gotNum) { setBadBit(); return FALSE; } \
  \
   char *ce; \
-  *s = '\0'; \
+  *s = NULL; \
   _convertType_ tempVal = _convertFunc_(buf, &ce, 0); \
  \
   if (ce != s) \
@@ -282,7 +282,7 @@
 gotAll: \
   \
   char *ce; \
-  *s = '\0'; \
+  *s = NULL; \
   double tempVal = _convertFunc_(buf, &ce); \
  \
   if (ce != s) \