TIFF: throw exception on 64-bit int data

Fixes #4089

Author: melissalinkert

components/formats-bsd/src/loci/formats/tiff/IFD.java

@@ -615,6 +615,9 @@ public int getPixelType() throws FormatException {
       case 24:
         return FormatTools.FLOAT;
       case 64:
+        if (bitFormat != 3) {
+          throw new FormatException("64-bit int data not supported");
+        }
         return FormatTools.DOUBLE;
       case 32:
         if (bitFormat == 3) return FormatTools.FLOAT;