Added proper error messages to data processor

plugins/libimhex/source/providers/provider.cpp

@@ -6,7 +6,6 @@
 #include <map>
 #include <optional>
 #include <string>
-#include <vector>
 
 namespace hex::prv {
 
@@ -14,6 +13,11 @@ namespace hex::prv {
         this->m_patches.emplace_back();
     }
 
+    Provider::~Provider() {
+        for (auto &overlay : this->m_overlays)
+            this->deleteOverlay(overlay);
+    }
+
     void Provider::read(u64 offset, void *buffer, size_t size) {
         this->readRaw(offset, buffer, size);
     }