pcap-file: add missing atomic init

It is mandatory to init all atomic to avoid problem on system
without atomic support.

src/runmode-pcap-file.c

@@ -24,6 +24,8 @@
 #include "output.h"
 #include "detect-engine-mpm.h"
 
+#include "source-pcap-file.h"
+
 #include "alert-fastlog.h"
 #include "alert-prelude.h"
 #include "alert-unified2-alert.h"
@@ -74,6 +76,8 @@ int RunModeFilePcapSingle(DetectEngineCtx *de_ctx)
     RunModeInitialize();
     TimeModeSetOffline();
 
+    PcapFileGlobalInit();
+
     /* create the threads */
     ThreadVars *tv = TmThreadCreatePacketHandler("PcapFile",
                                                  "packetpool", "packetpool",
@@ -164,6 +168,8 @@ int RunModeFilePcapAutoFp(DetectEngineCtx *de_ctx)
 
     TimeModeSetOffline();
 
+    PcapFileGlobalInit();
+
     /* Available cpus */
     uint16_t ncpus = UtilCpuGetNumProcessorsOnline();
 

src/source-pcap-file.c

@@ -131,6 +131,11 @@ void TmModuleDecodePcapFileRegister (void)
     tmm_modules[TMM_DECODEPCAPFILE].flags = TM_FLAG_DECODE_TM;
 }
 
+void PcapFileGlobalInit()
+{
+    SC_ATOMIC_INIT(pcap_g.invalid_checksums);
+}
+
 void PcapFileCallbackLoop(char *user, struct pcap_pkthdr *h, u_char *pkt)
 {
     SCEnter();

src/source-pcap-file.h

@@ -29,5 +29,7 @@ void TmModuleDecodePcapFileRegister (void);
 
 void PcapIncreaseInvalidChecksum();
 
+void PcapFileGlobalInit();
+
 #endif /* __SOURCE_PCAP_FILE_H__ */