Fix marshalling of string arrays.

* Affects only ImGui.Combo and ListBox.

src/CodeGenerator/Program.cs

@@ -660,8 +660,8 @@ namespace CodeGenerator
                     preCallLines.Add($"    fixed (char* sPtr = s)");
                     preCallLines.Add("    {");
                     preCallLines.Add($"        offset += Encoding.UTF8.GetBytes(sPtr, s.Length, {nativeArgName}_data + offset, {correctedIdentifier}_byteCounts[i]);");
-                    preCallLines.Add($"        offset += 1;");
                     preCallLines.Add($"        {nativeArgName}_data[offset] = 0;");
+                    preCallLines.Add($"        offset += 1;");
                     preCallLines.Add("    }");
                     preCallLines.Add("}");
 

src/ImGui.NET/Generated/ImGui.gen.cs

@@ -77,8 +77,8 @@ namespace ImGuiNET
                 fixed (char* sPtr = s)
                 {
                     offset += Encoding.UTF8.GetBytes(sPtr, s.Length, native_items_data + offset, items_byteCounts[i]);
-                    offset += 1;
                     native_items_data[offset] = 0;
+                    offset += 1;
                 }
             }
             byte** native_items = stackalloc byte*[items.Length];
@@ -126,8 +126,8 @@ namespace ImGuiNET
                 fixed (char* sPtr = s)
                 {
                     offset += Encoding.UTF8.GetBytes(sPtr, s.Length, native_items_data + offset, items_byteCounts[i]);
-                    offset += 1;
                     native_items_data[offset] = 0;
+                    offset += 1;
                 }
             }
             byte** native_items = stackalloc byte*[items.Length];
@@ -4901,8 +4901,8 @@ namespace ImGuiNET
                 fixed (char* sPtr = s)
                 {
                     offset += Encoding.UTF8.GetBytes(sPtr, s.Length, native_items_data + offset, items_byteCounts[i]);
-                    offset += 1;
                     native_items_data[offset] = 0;
+                    offset += 1;
                 }
             }
             byte** native_items = stackalloc byte*[items.Length];
@@ -4950,8 +4950,8 @@ namespace ImGuiNET
                 fixed (char* sPtr = s)
                 {
                     offset += Encoding.UTF8.GetBytes(sPtr, s.Length, native_items_data + offset, items_byteCounts[i]);
-                    offset += 1;
                     native_items_data[offset] = 0;
+                    offset += 1;
                 }
             }
             byte** native_items = stackalloc byte*[items.Length];