Fix mismatch of enum types in equality test

Lost in the noise of other warnings

Bug: b/123933266
Change-Id: I4c4eecb55a364c9afacf52b790f43f9d5c9640cb
Reviewed-on: https://swiftshader-review.googlesource.com/c/25012
Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
diff --git a/src/Device/Context.cpp b/src/Device/Context.cpp
index 6f12455..53bcaff 100644
--- a/src/Device/Context.cpp
+++ b/src/Device/Context.cpp
@@ -513,7 +513,7 @@
 			}
 			else
 			{
-				if(destBlendFactor() == VK_BLEND_OP_ZERO_EXT)
+				if(destBlendFactor() == VK_BLEND_FACTOR_ZERO)
 				{
 					return VK_BLEND_OP_ZERO_EXT;   // Negative, clamped to zero
 				}
@@ -681,7 +681,7 @@
 				}
 				else
 				{
-					if(destBlendFactorAlpha() == VK_BLEND_OP_ZERO_EXT)
+					if(destBlendFactorAlpha() == VK_BLEND_FACTOR_ZERO)
 					{
 						return VK_BLEND_OP_ZERO_EXT;   // Negative, clamped to zero
 					}