fix(heap): Fix HeapAllocator class

kernel/src/CppLib/CString.cpp

@@ -17,7 +17,7 @@ namespace kcp {
 
         do {
             if (*str == delimiter || *str == '\0') {
-                auto cstr = current_stream.cstr();
+                auto cstr = current_stream.c_str();
                 auto cstr_len = Lib::strlen(cstr);
 
                 result.push_back((const char*)Memory::g_heap->Request(sizeof(char) * (cstr_len + 1)));

kernel/src/CppLib/Stream.cpp

@@ -23,9 +23,9 @@ kcp::cstringstream::~cstringstream()
 kcp::cstringstream& kcp::cstringstream::operator<<(char c) {
     this->string = (char *)Memory::g_heap->Realloc((void *)this->string, this->size + 2);
 
-    if (!this->string)
+    if (this->string == nullptr)
     {
-        kerr << "Streaming failed due to failed allocation" << Kt::newline;
+        kerr << "kcp::cstringstream: Streaming failed due to failed allocation" << Kt::newline;
         return *this;
     }
     
@@ -85,6 +85,6 @@ kcp::cstringstream& kcp::cstringstream::operator<<(base nb)
     return *this;
 }
 
-const char* kcp::cstringstream::cstr() {
+const char* kcp::cstringstream::c_str() {
     return this->string;
 }

kernel/src/CppLib/Stream.hpp

@@ -39,6 +39,6 @@ namespace kcp {
 
         cstringstream& operator<<(base nb);
 
-        const char* cstr();
+        const char* c_str();
     };
 };