Fix Klocwork scan issues.

tools/hsbench/engine_hyperscan.h

@@ -65,8 +65,8 @@ public:
 class EngineHSStream : public EngineStream {
 public:
     ~EngineHSStream();
-    hs_stream_t *id;
-    EngineHSContext *ctx;
+    hs_stream_t *id = nullptr;
+    EngineHSContext *ctx = nullptr;
 };
 
 /** Hyperscan Engine for scanning data. */

tools/hsbench/engine_pcre.h

@@ -62,7 +62,7 @@ public:
 struct PcreDB {
     bool highlander = false;
     bool utf8 = false;
-    u32 id;
+    u32 id = 0;
     pcre *db = nullptr;
     pcre_extra *extra = nullptr;
 };

tools/hsbench/main.cpp

@@ -877,6 +877,7 @@ void displayCsvResults(const vector<unique_ptr<ThreadContext>> &threads,
     printf(",\"%0.3f\"", totalSecs);
     printf(",\"%0.2Lf\"", calc_mbps(totalSecs, totalBytes));
 
+    assert(bytesPerRun);
     double matchRate = ((double)matchesPerRun * 1024) / bytesPerRun;
     printf(",\"%llu\"", matchesPerRun);
     printf(",\"%0.3f\"", matchRate);