Depend: Improve error messages when reading a pefile files.

* In ``matchDLLArch`` state the name of the affected file and
  terminate (what effetivly suppresses the traceback).
* In ``getImports``: No longer print the traceback, but state the
  name of the affected file.

PyInstaller/depend/bindepend.py

@@ -184,17 +184,23 @@ def matchDLLArch(filename):
         return True
 
     global _exe_machine_type
-    if _exe_machine_type is None:
-        exe_pe = pefile.PE(sys.executable, fast_load=True)
-        _exe_machine_type = exe_pe.FILE_HEADER.Machine
-        exe_pe.close()
-
-    pe = pefile.PE(filename, fast_load=True)
-
-    match_arch = pe.FILE_HEADER.Machine == _exe_machine_type
-    pe.close()
+    try:
+        if _exe_machine_type is None:
+            pefilename = sys.executable  # for exception handling
+            exe_pe = pefile.PE(sys.executable, fast_load=True)
+            _exe_machine_type = exe_pe.FILE_HEADER.Machine
+            exe_pe.close()
+
+        pefilename = filename  # for exception handling
+        pe = pefile.PE(filename, fast_load=True)
+        match_arch = pe.FILE_HEADER.Machine == _exe_machine_type
+        pe.close()
+    except pefile.PEFormatError as exc:
+        raise SystemExit('Can not get architecture from file: %s\n'
+                         '  Reason: %s' % (pefilename, exception))
     return match_arch
 
+
 def Dependencies(lTOC, xtrapath=None, manifest=None, redirects=None):
     """
     Expand LTOC to include all the closure of binary dependencies.
@@ -724,8 +730,11 @@ def getImports(pth):
             # dependencies should already have been handled by
             # selectAssemblies in that case, so just warn, return an empty
             # list and continue.
-            logger.warning('Can not get binary dependencies for file: %s', pth,
-                           exc_info=1)
+            # For less specific errors also log the traceback.
+            logger.warning('Can not get binary dependencies for file: %s', pth)
+            logger.warning(
+                '  Reason: %s', exception,
+                exc_info=not isinstance(exception, pefile.PEFormatError))
             return []
     elif is_darwin:
         return _getImports_macholib(pth)