Fix -Wdouble-promotion issues (#436) #1011

Job	Run time
Windows MSVC CMake REL NC	8m 56s
Windows MSVC CMake DBG NC	12m 33s
Windows MSVC CMake REL	11m 0s
Windows MSVC CMake DBG	10m 25s
Ubuntu gcc CMake REL NC	1m 42s
Ubuntu gcc CMake DBG NC	1m 24s
Ubuntu gcc CMake REL	2m 16s
Ubuntu gcc CMake DBG	1m 24s
Ubuntu gcc Autotools REL NC	2m 43s
Ubuntu gcc Autotools DBG NC	2m 25s
Ubuntu gcc Autotools REL	2m 38s
Ubuntu gcc Autotools DBG	1m 55s
Ubuntu gcc SysXDR Autotools REL NC	2m 43s
Ubuntu gcc SysXDR Autotools DBG NC	1m 55s
Ubuntu gcc SysXDR Autotools REL	3m 8s
Ubuntu gcc SysXDR Autotools DBG	1m 47s
MacOS Clang CMake REL NC	2m 0s
MacOS Clang CMake DBG NC	2m 29s
MacOS Clang CMake REL	2m 38s
MacOS Clang CMake DBG	2m 7s
Ubuntu mingw CMake REL NC	5m 3s
Ubuntu mingw CMake DBG NC	40s
Ubuntu mingw CMake REL	3m 44s
Ubuntu mingw CMake DBG	51s
Windows static MSVC CMake REL NC	5m 29s
Windows static MSVC CMake DBG NC	8m 55s
Windows static MSVC CMake REL	9m 0s
Windows static MSVC CMake DBG	7m 48s
Ubuntu static gcc CMake REL NC	1m 24s
Ubuntu static gcc CMake DBG NC	1m 4s
Ubuntu static gcc CMake REL	1m 14s
Ubuntu static gcc CMake DBG	1m 6s
Ubuntu static gcc Autotools REL NC	1m 53s
Ubuntu static gcc Autotools DBG NC	1m 37s
Ubuntu static gcc Autotools REL	1m 53s
Ubuntu static gcc Autotools DBG	1m 40s
MacOS static Clang CMake REL NC	1m 49s
MacOS static Clang CMake DBG NC	1m 43s
MacOS static Clang CMake REL	2m 10s
MacOS static Clang CMake DBG	2m 20s
	2h 19m 31s

Provide feedback