openscanhub code analyzer findings

[nefigtut]

Hi, while packaging qat-zstd-plugin we've run openscanhub source code analyser and it found a couple of issues in this code. They are all for the test/test.c file, so not that much important, I believe. Still, could you please look into adding a couple of checks the analyzer warns about? Please, see an issue example:

Error: OVERRUN [CWE-119] [important]
QAT-ZSTD-Plugin-0.2.0/test/test.c:85:5: return_constant: Function call "lseek(inputFile, 0L, 2)" may return -1.
QAT-ZSTD-Plugin-0.2.0/test/test.c:85:5: assignment: Assigning: "inputFileSize" = "lseek(inputFile, 0L, 2)". The value of "inputFileSize" is now -1.
QAT-ZSTD-Plugin-0.2.0/test/test.c:94:5: overrun-buffer-arg: Calling "read" with "srcBuffer" and "inputFileSize" is suspicious because of the very large index, 18446744073709551615. The index may be due to a negative parameter being interpreted as unsigned.
#   92|       assert(dstBuffer != NULL);
#   93|   
#   94|->     bytesRead = read(inputFile, srcBuffer, inputFileSize);

I'm attaching full results tar-gzipped html file: scan-results-imp.tar.gz. Thank you!