Bunch of cleanups for warnings found by the llvm static analyzer.

llvm-svn: 165808
diff --git a/lldb/source/Interpreter/CommandObjectScript.cpp b/lldb/source/Interpreter/CommandObjectScript.cpp
index 76bfe6e..ce097b7 100644
--- a/lldb/source/Interpreter/CommandObjectScript.cpp
+++ b/lldb/source/Interpreter/CommandObjectScript.cpp
@@ -55,6 +55,7 @@
     {
         result.AppendError("no script interpreter");
         result.SetStatus (eReturnStatusFailed);
+        return false;
     }
 
     DataVisualization::ForceUpdate(); // script might change Python code we use for formatting.. make sure we keep up to date with it