Test: fix conditional execution of HINCRBYFLOAT representation test.

tests/unit/type/hash.tcl

@@ -525,7 +525,7 @@ start_server {tags {"hash"}} {
     # 1.23 cannot be represented correctly with 64 bit doubles, so we skip
     # the test, since we are only testing pretty printing here and is not
     # a bug if the program outputs things like 1.299999...
-    if {!$::valgrind || ![string match *x86_64* [exec uname -a]]} {
+    if {!$::valgrind && [string match *x86_64* [exec uname -a]]} {
         test {Test HINCRBYFLOAT for correct float representation (issue #2846)} {
             r del myhash
             assert {[r hincrbyfloat myhash float 1.23] eq {1.23}}