Fix indexing issue breaking function declarations.

Semantic_Analysis.jai

@@ -21,8 +21,8 @@ Semantic_Type :: enum {
 	Half      :: 1;
 	Float     :: 2;
 	Double    :: 3;
-	Texture2D :: 8;
-	Sampler   :: 9;
+	Texture2D :: 4;
+	Sampler   :: 5;
 
 	Max_Builtin :: Sampler + 1;
 
@@ -49,8 +49,8 @@ Typenames :: string.[
 	"half"     ,
 	"float"    ,
 	"double"   ,
-	"sampler"  ,
 	"texture2D",
+	"sampler"  ,
 ];
 
 Type_Variable :: struct {
@@ -1015,7 +1015,7 @@ declare_function :: (checker : *Semantic_Checker, node : *AST_Node, builtin : bo
 			all_same : bool = true;
 			for i : 0..func_var.child_count - 1 {
 				arg := func_var.children[i];
-				node_child := field_list.children[it_index];
+				node_child := field_list.children[i];
 
 				typename : string;
 				arg_type := get_type_from_identifier(checker, checker.current_scope, node_child, *typename);