wx: Fix bad float in return values

To many floats in return value could cause a reallocation and
pointers to reallocated data. Fix it by ensuring that the temp
float array is large enough before add values to it.

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/wx/c_src/wxe_return.cpp b/lib/wx/c_src/wxe_return.cpp
index aebf6bae1b..accd818a14 100644
--- a/lib/wx/c_src/wxe_return.cpp
+++ b/lib/wx/c_src/wxe_return.cpp
@@ -84,7 +84,13 @@ INLINE
 unsigned  int wxeReturn::size() {
      return rt.GetCount();
  }
- 
+
+
+INLINE
+void wxeReturn::ensureFloatCount(size_t n) {
+  temp_float.Alloc(n);
+}
+
 INLINE
 void wxeReturn::add(ErlDrvTermData type, ErlDrvTermData data) {
     rt.Add(type);
@@ -222,6 +228,7 @@ INLINE
 void  wxeReturn::add(wxArrayDouble val) {
   unsigned int len = val.GetCount();
 
+  temp_float.Alloc(len);
   for (unsigned int i = 0; i< len; i++) {
     addFloat(val[i]);
   }