added varargs version of luax_convobj (for making Rasterizers)

src/common/runtime.cpp

@@ -267,6 +267,17 @@ namespace love
 		lua_replace(L, idx); // Replace the initial argument with the new object.
 		return 0;
 	}
+	
+	int luax_convobj(lua_State * L, int idxs[], int n, const char * mod, const char * fn)
+	{
+		luax_getfunction(L, mod, fn);
+		for (int i = 0; i < n; i++) {
+			lua_pushvalue(L, idxs[i]); // The arguments.
+		}
+		lua_call(L, n, 1); // Call the function, n args, one return value.
+		lua_replace(L, idxs[0]); // Replace the initial argument with the new object.
+		return 0;
+	}
 
 	int luax_strtofile(lua_State * L, int idx)
 	{

src/common/runtime.h

@@ -209,7 +209,7 @@ namespace love
 	/**
 	* Converts an object into another object by the specified function love.module.function.
 	* The conversion function must accept a single object of the relevant type as a parameter, 
-	* and returnone value. If the function does not exist (see luax_getfunction), an error is returned.
+	* and return one value. If the function does not exist (see luax_getfunction), an error is returned.
 	* 
 	* Note that the initial object at idx is replaced by the new object.
 	* 
@@ -219,6 +219,21 @@ namespace love
 	* @param function The function in the module.
 	**/
 	int luax_convobj(lua_State * L, int idx, const char * module, const char * function);
+	
+	/**
+	* Converts an object into another object by the specified function love.module.function.
+	* The conversion function must accept a single object of the relevant type as its first parameter, 
+	* and return one value. If the function does not exist (see luax_getfunction), an error is returned.
+	* 
+	* Note that the initial object at idx is replaced by the new object.
+	* 
+	* @param L The Lua state.
+	* @param idxs An array of indices on the stack.
+	* @param n How many arguments are being passed.
+	* @param module The module in the love table.
+	* @param function The function in the module.
+	**/
+	int luax_convobj(lua_State * L, int idxs[], int n, const char * module, const char * function);
 
 	/**
 	* 'Insist' that a table 'k' exists in the table at idx. Insistence involves that the