Don't reconstruct expression on encountering fatal error

In some cases, like when given

```cpp
std::vector<char>* str =
reinterpret_cast<std::vector<char>*>(0x1234458);
CHECK(*str == std::vector<char>());
```

reconstructing the expression to report it would cause another fatal
error. Instead we just put together an AssertionResult without
reconstructing the expression fully.

This should fully fix #810

include/internal/catch_fatal_condition.hpp

@@ -53,7 +53,6 @@ namespace Catch {
         static LONG CALLBACK handleVectoredException(PEXCEPTION_POINTERS ExceptionInfo) {
             for (int i = 0; i < sizeof(signalDefs) / sizeof(SignalDefs); ++i) {
                 if (ExceptionInfo->ExceptionRecord->ExceptionCode == signalDefs[i].id) {
-                    reset();
                     reportFatal(signalDefs[i].name);
                 }
             }