Ran the static analyzer on the codebase and found a few things.

llvm-svn: 160338
diff --git a/lldb/source/API/SBFrame.cpp b/lldb/source/API/SBFrame.cpp
index 0404120..8c0e98a 100644
--- a/lldb/source/API/SBFrame.cpp
+++ b/lldb/source/API/SBFrame.cpp
@@ -1038,7 +1038,7 @@
     
     LogSP expr_log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
 
-    ExecutionResults exe_results;
+    ExecutionResults exe_results = eExecutionSetupError;
     SBValue expr_result;
     ValueObjectSP expr_value_sp;