Merge pull request #4176 from Beep6581/extraclean

get rt cleaner when built using -Wextra #4155

rtengine/iptransform.cc

@@ -788,6 +788,10 @@ void ImProcFunctions::transformGeneral(ImProcFunctions::TransformMode mode, Imag
     bool enableLCPDist = false;
     bool enableCA = false;
 
+#ifdef __GNUC__ // silence warning
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
     switch (mode) {
         case ImProcFunctions::TRANSFORM_HIGH_QUALITY_FULLIMAGE: {
             enableLCPCA = pLCPMap && params->lensProf.useCA && pLCPMap->isCACorrectionAvailable();
@@ -806,6 +810,9 @@ void ImProcFunctions::transformGeneral(ImProcFunctions::TransformMode mode, Imag
             break;
         }
     }
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
 
     if (enableLCPCA) {
         enableLCPDist = false;