Find dynamic runtime libraries for MSVC12.

CMakeLists.txt

@@ -60,6 +60,21 @@ if(MSVC11)
 			message(WARNING "Could not find msvcp110.dll, msvcr110.dll")
 		endif()
 	endif()
+elseif(MSVC12)
+	set(VS120COMNTOOLS "$ENV{VS120COMNTOOLS}")
+	if(${VS120COMNTOOLS} STREQUAL "")
+		message(WARNING "Environment variable VS120COMNTOOLS not defined. Is VS12 properly installed?")
+	else()
+		get_filename_component(VS120_REDIST_DIR ${VS120COMNTOOLS}/../../VC/redist/${MEGA_ARCH}/Microsoft.VC120.CRT ABSOLUTE)
+		set(MSVCP120_DLL ${VS120_REDIST_DIR}/msvcp120.dll)
+		set(MSVCR120_DLL ${VS120_REDIST_DIR}/msvcr120.dll)
+		if(EXISTS ${MSVCP120_DLL} AND EXISTS ${MSVCR120_DLL})
+			message(STATUS "Found msvcp120.dll, msvcr120.dll")
+			set(MEGA_MSVC_DLLS ${MSVCP120_DLL} ${MSVCR120_DLL})
+		else()
+			message(WARNING "Could not find msvcp120.dll, msvcr120.dll")
+		endif()
+	endif()
 endif()
 
 set(MEGA_ZLIB_VER "1.2.8")