libobs-d3d11: Fix incorrect format string

Detected by PVS Studio.

libobs-d3d11/d3d11-rebuild.cpp

@@ -77,7 +77,7 @@ void gs_texture_2d::Rebuild(ID3D11Device *dev)
 					     (void **)&texture);
 		if (FAILED(hr)) {
 			blog(LOG_WARNING,
-			     "Failed to rebuild shared texture: ", "0x%08lX",
+			     "Failed to rebuild shared texture: 0x%08lX",
 			     hr);
 			RebuildSharedTextureFallback();
 		}
@@ -338,7 +338,7 @@ void gs_texture_3d::Rebuild(ID3D11Device *dev)
 					     (void **)&texture);
 		if (FAILED(hr)) {
 			blog(LOG_WARNING,
-			     "Failed to rebuild shared texture: ", "0x%08lX",
+			     "Failed to rebuild shared texture: 0x%08lX",
 			     hr);
 			RebuildSharedTextureFallback();
 		}