libCom: fix possible memory leaks in iocLogServer.c

found by static code analysis (cppcheck @ sonarqube)

modules/libcom/src/log/iocLogServer.c

@@ -113,8 +113,8 @@ int main(void)
 
     pserver->pfdctx = (void *) fdmgr_init();
     if (!pserver->pfdctx) {
-        free(pserver);
         fprintf(stderr, "iocLogServer: %s\n", strerror(errno));
+        free(pserver);
         return IOCLS_ERROR;
     }
 
@@ -149,6 +149,7 @@ int main(void)
         fprintf (stderr,
             "iocLogServer: a server is already installed on port %u?\n",
             (unsigned)ioc_log_port);
+        free(pserver);
         return IOCLS_ERROR;
     }
 
@@ -158,6 +159,7 @@ int main(void)
         char sockErrBuf[64];
         epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
         fprintf(stderr, "iocLogServer: listen err %s\n", sockErrBuf);
+        free(pserver);
         return IOCLS_ERROR;
     }
 
@@ -174,6 +176,7 @@ int main(void)
         char sockErrBuf[64];
         epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
         fprintf(stderr, "iocLogServer: ioctl FIONBIO err %s\n", sockErrBuf);
+        free(pserver);
         return IOCLS_ERROR;
     }
 
@@ -190,6 +193,7 @@ int main(void)
             "File access problems to `%s' because `%s'\n",
             ioc_log_file_name,
             strerror(errno));
+        free(pserver);
         return IOCLS_ERROR;
     }
 
@@ -202,6 +206,7 @@ int main(void)
     if (status < 0) {
         fprintf(stderr,
             "iocLogServer: failed to add read callback\n");
+        free(pserver);
         return IOCLS_ERROR;
     }