diff -ru spamprobe-1.4d/src/database/HashDataFile.h spamprobe-1.4d-jishac-patch/src/database/HashDataFile.h
--- spamprobe-1.4d/src/database/HashDataFile.h	2006-11-17 02:24:48.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/database/HashDataFile.h	2021-01-10 21:00:27.474524866 -0500
@@ -93,7 +93,7 @@
 
   bool isReadOnly() const
   {
-    m_isReadOnly;
+    return m_isReadOnly;
   }
 
   int createMode() const
diff -ru spamprobe-1.4d/src/includes/Message.h spamprobe-1.4d-jishac-patch/src/includes/Message.h
--- spamprobe-1.4d/src/includes/Message.h	2006-11-17 02:24:48.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/includes/Message.h	2021-01-10 21:01:54.234648878 -0500
@@ -109,7 +109,7 @@
     m_source.set(source);
   }
 
-  void setMaxTokenCount(int value)
+  void setMaxTokenCount(unsigned int value)
   {
     m_maxTokenCount = value;
   }
@@ -136,7 +136,7 @@
   map<string,Token *> m_tokensByName;
   vector<Token *> m_topTokens;
   Ptr<MailMessage> m_source;
-  int m_maxTokenCount;
+  unsigned int m_maxTokenCount;
 };
 
 #endif // _Message_h
diff -ru spamprobe-1.4d/src/parser/GifParser.cc spamprobe-1.4d-jishac-patch/src/parser/GifParser.cc
--- spamprobe-1.4d/src/parser/GifParser.cc	2021-01-10 21:06:25.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/parser/GifParser.cc	2021-01-10 21:02:32.850704274 -0500
@@ -94,6 +94,7 @@
   } catch (runtime_error &ex) {
     return false;
   }
+  return true;
 }
 
 void GifParser::openImage()
diff -ru spamprobe-1.4d/src/parser/JpegParser.cc spamprobe-1.4d-jishac-patch/src/parser/JpegParser.cc
--- spamprobe-1.4d/src/parser/JpegParser.cc	2006-11-17 02:11:08.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/parser/JpegParser.cc	2021-01-10 21:02:52.730732835 -0500
@@ -64,6 +64,7 @@
   } catch (runtime_error &ex) {
     return false;
   }
+  return true;
 }
 
 void JpegParser::tokenizeMarker(const string &base_token,
@@ -73,7 +74,7 @@
   prefix += num_to_string(marker->marker);
   prefix += "_";
   string token;
-  for (int i = 0; i < marker->data_length; ++i) {
+  for (unsigned int i = 0; i < marker->data_length; ++i) {
     char ch = (char)marker->data[i];
     if (isprint(ch)) {
       token += ch;
diff -ru spamprobe-1.4d/src/parser/MessageHeaderList.cc spamprobe-1.4d-jishac-patch/src/parser/MessageHeaderList.cc
--- spamprobe-1.4d/src/parser/MessageHeaderList.cc	2006-11-17 02:24:49.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/parser/MessageHeaderList.cc	2021-01-10 21:03:05.874751734 -0500
@@ -39,7 +39,7 @@
 CRef<AbstractMultiLineString> MessageHeaderList::header(const string &name) const
 {
     MultiLineStringList values;
-    for (int i = 0; i < m_headers.size(); ++i) {
+    for (long unsigned int i = 0; i < m_headers.size(); ++i) {
         if (m_headers[i]->hasName(name)) {
             values.push_back(m_headers[i]->lines());
         }
diff -ru spamprobe-1.4d/src/parser/PngParser.cc spamprobe-1.4d-jishac-patch/src/parser/PngParser.cc
--- spamprobe-1.4d/src/parser/PngParser.cc	2021-01-10 21:06:25.000000000 -0500
+++ spamprobe-1.4d-jishac-patch/src/parser/PngParser.cc	2021-01-10 21:03:30.866787701 -0500
@@ -38,11 +38,11 @@
 #include "PngParser.h"
 
 #ifndef int_p_NULL
-#define int_p_NULL NULL
+#define int_p_NULL (int*)NULL
 #endif
 
 #ifndef png_infopp_NULL
-#define png_infopp_NULL NULL
+#define png_infopp_NULL (png_infopp)NULL
 #endif
 
 PngParser::PngParser(Message *message,
@@ -76,6 +76,7 @@
   } catch (runtime_error &ex) {
     return false;
   }
+  return true;
 }
 
 void PngParser::initializeImage()