update atmos phys hash

Author: peverwhee

.gitmodules

@@ -36,7 +36,7 @@
 [submodule "atmos_phys"]
 	path = src/atmos_phys
 	url = https://github.com/peverwhee/atmospheric_physics
-        fxtag = 9cfcb2eaca2c63a4a6f00799b226cd9893a38f64
+        fxtag = 74c16d2905c6945ba210103494971fc48aca34f2
         fxrequired = AlwaysRequired
 	fxDONOTUSEurl = https://github.com/ESCOMP/atmospheric_physics