Fix MakeGen crashing when entering invalid filepaths in dependency

Makefile

@@ -1,4 +1,4 @@
-# This Makefile was generated using MakeGen v1.3.0 made by Tim Håkansson
+# This Makefile was generated using MakeGen v1.3.2 made by Tim Håkansson
 # and is licensed under MIT. Full source of the project can be found at
 # https://github.com/Thraix/MakeGen
 CC=@g++

makegen.xml

@@ -19,5 +19,5 @@
     <srcdir>src/</srcdir>
   </configuration>
   <target>Release</target>
-  <version>v1.3.1</version>
+  <version>v1.3.2</version>
 </makegen>

src/Common.h

@@ -12,7 +12,7 @@
 // Release, should be backwards compatible with any minor version
 #define MAKEGEN_VERSION_RELEASE 3
 // Minor changes, generally bug fixes
-#define MAKEGEN_VERSION_MINOR 1
+#define MAKEGEN_VERSION_MINOR 2
 
 #define MAKEGEN_VERSION ("v" STR(MAKEGEN_VERSION_MAJOR) "." STR(MAKEGEN_VERSION_RELEASE) "." STR(MAKEGEN_VERSION_MINOR))
 

src/ConfigFile.cpp

@@ -333,6 +333,8 @@ std::optional<ConfigFile> ConfigFile::GetConfigFile(const std::string& filepath)
 std::optional<ConfigFile> ConfigFile::GetConfigFile(const std::string& filepath, std::map<std::string, ConfigFile>& loadedConfigs)
 {
   std::string realPath = FileUtils::GetRealPath(filepath);
+  if(realPath == "")
+    return {};
   auto it = loadedConfigs.find(realPath);
   if(it != loadedConfigs.end())
   {
@@ -489,7 +491,7 @@ ConfigFile ConfigFile::Gen()
     configuration.AddXMLObject({"dependency",{},*it});
 
   makegen.AddXMLObject(configuration);
-  return ConfigFile{makegen, FileUtils::GetRealPath("./")};
+  return ConfigFile{makegen, FileUtils::GetRealPath(".")};
 }
 
 void ConfigFile::Save() const

src/FileUtils.h

@@ -59,14 +59,22 @@ struct FileUtils
   static std::string GetRealPath(const std::string& filename)
   {
 #if defined(__linux__)
+    if(access(filename.c_str(), F_OK ) != -1)
+    {
       char* path = realpath(filename.c_str(), NULL);
       std::string sPath = path;
       sPath+="/";
       free(path);
       return sPath;
+    }
+    else
+    {
+      LOG_ERROR("Directory doesn't exist: ", filename);
+      return "";
+    }
 #endif
     LOG_ERROR("GetRealPath not supported");
-    return filename;
+    return "";
   }
 
   static std::string GetRelativePath(std::string from, std::string to)