Crash if updating labels on google_project fails

[ewbankkit]

Crash when attempting to update labels on a google_project resource and that update fails:

panic: runtime error: invalid memory address or nil pointer dereference
2018-01-27T16:39:38.583-0500 [DEBUG] plugin.terraform-provider-google_v1.5.0_x4: [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1e936ef]
2018-01-27T16:39:38.583-0500 [DEBUG] plugin.terraform-provider-google_v1.5.0_x4: 
2018-01-27T16:39:38.583-0500 [DEBUG] plugin.terraform-provider-google_v1.5.0_x4: goroutine 208 [running]:
2018-01-27T16:39:38.583-0500 [DEBUG] plugin.terraform-provider-google_v1.5.0_x4: github.com/terraform-providers/terraform-provider-google/google.resourceGoogleProjectUpdate(0xc42041d030, 0x20edc00, 0xc42067cd20, 0x24, 0x2e63f00)
2018-01-27T16:39:38.583-0500 [DEBUG] plugin.terraform-provider-google_v1.5.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/google/resource_google_project.go:292 +0xbaf
...

Relevant code:
https://github.com/terraform-providers/terraform-provider-google/blob/838296e155281a0014092248216cab4e2dc2b262/google/resource_google_project.go#L290-L293

The problem is that p is nil on failure so p.Name causes the nil pointer dereference panic.

[ghost]

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