Fixed weird fmod bug I guess

src/dawn/display/shader/ShaderManager.cpp

@@ -8,6 +8,7 @@
 using namespace Dawn;
 
 ShaderManager::ShaderManager() {
+  this->nextId = 0;
   this->nextLock = 0;
 }
 

src/dawn/display/shader/ShaderManager.hpp

@@ -59,7 +59,7 @@ namespace Dawn {
           shaderId = shader->shaderId;
         }
 
-        shaderlock_t lock = this->nextId++;
+        shaderlock_t lock = this->nextLock++;
         this->shaderLocks[lock] = shaderId;
         this->shaderLocksByShader[shaderId].push_back(lock);
         return lock;