Utils: Initialize member of ElfMapper

Change-Id: I057671738763e0b1522a3f44524607d7eda66636
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/elfreader.h

@@ -184,7 +184,7 @@ public:
     QFile file;
     QByteArray raw;
     union { const char *start; const uchar *ustart; };
-    quint64 fdlen;
+    quint64 fdlen = 0;
 };
 
 } // namespace Utils