Better warning in case of an internal error of a layout element

Better warning in case of an internal error. At the moment we could get warnings like:
```
error: Internal inconsistency: member 10 should not be part of LayoutDocManager::Namespace entry list
```
though it would be better to have a mnemonic instead of a number.

Author: albert-github

src/classdef.cpp

@@ -2872,8 +2872,8 @@ void ClassDefImpl::writeDocumentationContents(OutputList &ol,const QCString & /*
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Class entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Class entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/conceptdef.cpp

@@ -609,8 +609,8 @@ void ConceptDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Concept entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Concept entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/dirdef.cpp

@@ -643,8 +643,8 @@ void DirDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::MemberDef:
       case LayoutDocEntry::MemberDefStart:
       case LayoutDocEntry::MemberDefEnd:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Directory entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Directory entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/filedef.cpp

@@ -1027,8 +1027,8 @@ void FileDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::File entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::File entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/groupdef.cpp

@@ -1317,8 +1317,8 @@ void GroupDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Group entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Group entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/moduledef.cpp

@@ -463,8 +463,8 @@ void ModuleDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Module entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Module entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }

src/namespacedef.cpp

@@ -1116,8 +1116,8 @@ void NamespaceDefImpl::writeDocumentation(OutputList &ol)
       case LayoutDocEntry::DirSubDirs:
       case LayoutDocEntry::DirFiles:
       case LayoutDocEntry::DirGraph:
-        err("Internal inconsistency: member %d should not be part of "
-            "LayoutDocManager::Namespace entry list\n",lde->kind());
+        err("Internal inconsistency: member '%s' should not be part of "
+            "LayoutDocManager::Namespace entry list\n",qPrint(lde->entryToString()));
         break;
     }
   }