Replace mjCModel with mjmModel in mjXBase.

PiperOrigin-RevId: 611762880
Change-Id: I22254689b6cbf10fe7b61f9742b6ffd6c2074477

src/user/user_flexcomp.h

@@ -42,7 +42,7 @@ typedef enum _mjtFcompType {
 class mjCFlexcomp {
  public:
   mjCFlexcomp(void);
-  bool Make(mjCModel* model, mjmBody* body, char* error, int error_sz);
+  bool Make(mjmModel* modelspec, mjmBody* body, char* error, int error_sz);
 
   bool MakeGrid(char* error, int error_sz);
   bool MakeBox(char* error, int error_sz);