btf: Bug 549944: NullPointerException in BtfTrace.validate()

[Fixed] Bug 549944: NullPointerException in BtfTrace.validate()

Change-Id: Iccaba6f05dd49d4c8671eea141a41244c5e3132d
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/147391
Tested-by: CI Bot
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
diff --git a/btf/org.eclipse.tracecompass.btf.core/src/org/eclipse/tracecompass/btf/core/trace/BtfTrace.java b/btf/org.eclipse.tracecompass.btf.core/src/org/eclipse/tracecompass/btf/core/trace/BtfTrace.java
index 68804c2..955f084 100644
--- a/btf/org.eclipse.tracecompass.btf.core/src/org/eclipse/tracecompass/btf/core/trace/BtfTrace.java
+++ b/btf/org.eclipse.tracecompass.btf.core/src/org/eclipse/tracecompass/btf/core/trace/BtfTrace.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2014, 2017 Ericsson
+ * Copyright (c) 2014, 2019 Ericsson
  *
  * All rights reserved. This program and the accompanying materials are
  * made available under the terms of the Eclipse Public License v1.0 which
@@ -274,7 +274,7 @@
             while ((line != null) && (lineCount++ < MAX_LINES)) {
                 // Skip comment lines
                 while (line != null && line.startsWith("#")) { //$NON-NLS-1$
-                    line = fFileInput.readLine();
+                    line = rafile.readLine();
                 }
                 ITmfEvent event = parseLine(0, line);
                 if (event != null) {