[lldb] Fix uninitialized variable

Author: adrian-prantl

lldb/include/lldb/Target/StackFrame.h

@@ -539,7 +539,7 @@ class StackFrame : public ExecutionContextScope,
   Flags m_flags;
   Scalar m_frame_base;
   Status m_frame_base_error;
-  uint16_t m_frame_recognizer_generation;
+  uint16_t m_frame_recognizer_generation = 0;
   /// Does this frame have a CFA?  Different from CFA == LLDB_INVALID_ADDRESS.
   bool m_cfa_is_valid;
   Kind m_stack_frame_kind;