Merge pull request #12240 from pasbi:pfm_fix

* fixed 64-float pfm auto conversion

* removed trailing whitespace

modules/imgcodecs/src/grfmt_pfm.cpp

@@ -185,7 +185,9 @@ PFMEncoder::~PFMEncoder()
 
 bool PFMEncoder::isFormatSupported(int depth) const
 {
-  return CV_MAT_DEPTH(depth) == CV_32F || CV_MAT_DEPTH(depth) == CV_8U;
+  // any depth will be converted into 32-bit float.
+  (void) depth;
+  return true;
 }
 
 bool PFMEncoder::write(const Mat& img, const std::vector<int>& params)