Fix more clangd errors

This also seems to fix the problem where clangd failed to index most header files, which was due to the typo in JGeometry.h.

src/JSystem/JKernel/JKRThread.cpp

@@ -25,7 +25,7 @@ JKRThread::JKRThread(u32 stack_size, int message_count, int param_3) : mThreadLi
     mThreadRecord = (OSThread*)JKRAllocFromHeap(mHeap, sizeof(OSThread), 0x20);
 
     void* stackBase = (void*)((int)mStackMemory + mStackSize);
-    OSCreateThread(mThreadRecord, start, this, stackBase, mStackSize, param_3, 1);
+    OSCreateThread(mThreadRecord, (void*)start, this, stackBase, mStackSize, param_3, 1);
 
     mMessageCount = message_count;
     mMessages = (OSMessage*)JKRAllocFromHeap(mHeap, mMessageCount * sizeof(OSMessage), 0);
@@ -135,4 +135,4 @@ void JKRThreadSwitch::callback(OSThread* current, OSThread* next) {
 static void dummy() {
     OSReport("Cannot create JKRTask Manager.");
     OSReport("sManager != 0");
-}
+}