Use SGBinaryFile in a couple more places.

Most importantly, when computing a hash from the on-disk
state.

simgear/io/HTTPRepository.cxx

@@ -843,7 +843,7 @@ HTTPRepository::failure() const
         sha1_init(&info);
         char* buf = static_cast<char*>(malloc(1024 * 1024));
         size_t readLen;
-        SGFile f(p.str());
+        SGBinaryFile f(p.str());
         if (!f.open(SG_IO_IN)) {
             throw sg_io_exception("Couldn't open file for compute hash", p);
         }

simgear/io/test_repository.cxx

@@ -286,7 +286,7 @@ std::string test_computeHashForPath(const SGPath& p)
     char* buf = static_cast<char*>(alloca(1024 * 1024));
     size_t readLen;
 
-    SGFile f(p.str());
+    SGBinaryFile f(p.str());
     f.open(SG_IO_IN);
 
     while ((readLen = f.read(buf, 1024 * 1024)) > 0) {

simgear/package/CatalogTest.cxx

@@ -46,7 +46,7 @@ std::string readFileIntoString(const SGPath& path)
     std::string contents;
 
     size_t readLen;
-    SGFile f(path.str());
+    SGBinaryFile f(path.str());
     if (!f.open(SG_IO_IN)) {
         throw sg_io_exception("Couldn't open file", path);
     }