Runtime file updates.
updated for version 7.4.274
Problem:    When doing ":update" just before running an external command that
	    changes the file, the timestamp may be unchanged and the file
	    is not reloaded.
Solution:   Also check the file size.
Added tag v7-4-274 for changeset 1ee3fc5b40ae
updated for version 7.4.275
Problem:    When changing the type of a sign that hasn't been placed ther is
	    no error message.
Solution:   Add an error message. (Christian Brabandt)
Added tag v7-4-275 for changeset 8a3117a4887c
updated for version 7.4.276
Problem:    The fish shell is not supported.
Solution:   Use begin/end instead of () for fish. (Andy Russell)
Added tag v7-4-276 for changeset a6b59ee633a3
updated for version 7.4.277
Problem:    Using ":sign unplace *" may leave the cursor in the wrong position
	    (Christian Brabandt)
Solution:   Update the cursor position when removing all signs.
Added tag v7-4-277 for changeset 373204662d82
updated for version 7.4.278
Problem:    list_remove() conflicts with function defined in Sun header file.
Solution:   Rename the function. (Richard Palo)
Added tag v7-4-278 for changeset b4ce0e1fb5a6
updated for version 7.4.279
Problem:    globpath() returns a string, making it difficult to get a list of
	    matches. (Greg Novack)
Solution:   Add an optional argument like with glob(). (Adnan Zafar)
Added tag v7-4-279 for changeset 8e9db1f27a00
updated for version 7.4.280
Problem:    When using a session file the relative position of the cursor is
	    not restored if there is another tab. (Nobuhiro Takasaki)
Solution:   Update w_wrow before calculating the fraction.
Added tag v7-4-280 for changeset daf7e98675cf
updated for version 7.4.281
Problem:    When a session file has more than one tabpage and 'showtabline' is
	    one the positions may be slightly off.
Solution:   Set 'showtabline' to two while positioning windows.
Added tag v7-4-281 for changeset 24c90f1fec85
updated for version 7.4.282
Problem:    Test 97 fails on Mac.
Solution:   Do not ignore case in file names. (Jun Takimoto)
Added tag v7-4-282 for changeset 6d0a1132dd71
updated for version 7.4.283
Problem:    Compiler warning about unused variable. (Charles Cooper)
Solution:   Move the variable inside the #if block.