Fix #155, Add check for CFE_SB_NO_MESSAGE

[anhvan989]

Fix #155, add check for CFE_SB_NO_MESSAGE.

points to old pull request. #156

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• I reviewed the Contributing Guide.
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Describe the contribution
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• Include explicitly what issue it addresses [e.g. Fixes #X]

Testing performed
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1. make native_std.prep

2. make native_std.install

3. cd build-native_std/exe/cpu1/

4. ./core-cpu1

5. make native_std.runtest

6. make native_std.lcov

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• API Change: xxx (if applicable)
• Behavior Change: xxx (if applicable)
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System(s) tested on

• Hardware: [e.g. PC, SP0, MCP750]
• OS: [e.g. Ubuntu 18.04, RTEMS 4.11, VxWorks 6.9]
• Versions: [e.g. cFE 6.6, OSAL 4.2, PSP 1.3 for mcp750, any related apps or tools]

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Anh Van/ GSFC